forked from Minki/linux
pinctrl: fsl: add scu based pinctrl support
Some i.MX SoCs (e.g. MX8QXP and MX8QM) contain a system controller that is responsible for controlling the pad setting of the IPs that are present. Communication between the host processor running an OS and the system controller happens through a SCU protocol. This patch classifies the pad settings into two categories: MMIO and SCU. For the original MMIO method, no functional changes except organize them into a few imx_*_mmio() functions. Besides that, we add the SCU based Pad Mux and Pinconf setting support which are implemented in pinctrl-scu.c. Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Fabio Estevam <festevam@gmail.com> Cc: Stefan Agner <stefan@agner.ch> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
A.s. Dong
Linus Walleij
parent
1ccb0426d7
commit
b96eea718b
@ -5,6 +5,10 @@ config PINCTRL_IMX
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select GENERIC_PINCONF
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select REGMAP
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config PINCTRL_IMX_SCU
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bool
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select PINCTRL_IMX
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config PINCTRL_IMX1_CORE
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bool
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select PINMUX
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@ -1,6 +1,7 @@
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# SPDX-License-Identifier: GPL-2.0
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# Freescale pin control drivers
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obj-$(CONFIG_PINCTRL_IMX) += pinctrl-imx.o
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obj-$(CONFIG_PINCTRL_IMX_SCU) += pinctrl-scu.o
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obj-$(CONFIG_PINCTRL_IMX1_CORE) += pinctrl-imx1-core.o
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obj-$(CONFIG_PINCTRL_IMX1) += pinctrl-imx1.o
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obj-$(CONFIG_PINCTRL_IMX21) += pinctrl-imx21.o
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@ -57,9 +57,11 @@ static int imx_dt_node_to_map(struct pinctrl_dev *pctldev,
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struct pinctrl_map **map, unsigned *num_maps)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct group_desc *grp;
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struct pinctrl_map *new_map;
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struct device_node *parent;
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struct imx_pin *pin;
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int map_num = 1;
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int i, j;
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@ -73,11 +75,14 @@ static int imx_dt_node_to_map(struct pinctrl_dev *pctldev,
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return -EINVAL;
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}
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for (i = 0; i < grp->num_pins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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if (!(pin->config & IMX_NO_PAD_CTL))
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map_num++;
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if (info->flags & IMX_USE_SCU) {
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map_num += grp->num_pins;
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} else {
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for (i = 0; i < grp->num_pins; i++) {
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pin = &((struct imx_pin *)(grp->data))[i];
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if (!(pin->conf.mmio.config & IMX_NO_PAD_CTL))
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map_num++;
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}
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}
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new_map = kmalloc_array(map_num, sizeof(struct pinctrl_map),
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@ -102,16 +107,26 @@ static int imx_dt_node_to_map(struct pinctrl_dev *pctldev,
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/* create config map */
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new_map++;
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for (i = j = 0; i < grp->num_pins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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if (!(pin->config & IMX_NO_PAD_CTL)) {
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new_map[j].type = PIN_MAP_TYPE_CONFIGS_PIN;
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new_map[j].data.configs.group_or_pin =
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pin = &((struct imx_pin *)(grp->data))[i];
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new_map[j].type = PIN_MAP_TYPE_CONFIGS_PIN;
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new_map[j].data.configs.group_or_pin =
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pin_get_name(pctldev, pin->pin);
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new_map[j].data.configs.configs = &pin->config;
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if (info->flags & IMX_USE_SCU) {
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/*
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* For SCU case, we set mux and conf together
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* in one IPC call
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*/
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new_map[j].data.configs.configs =
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(unsigned long *)&pin->conf.scu;
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new_map[j].data.configs.num_configs = 2;
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} else if (!(pin->conf.mmio.config & IMX_NO_PAD_CTL)) {
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new_map[j].data.configs.configs =
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&pin->conf.mmio.config;
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new_map[j].data.configs.num_configs = 1;
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j++;
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}
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j++;
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}
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dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
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@ -133,19 +148,96 @@ static const struct pinctrl_ops imx_pctrl_ops = {
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.pin_dbg_show = imx_pin_dbg_show,
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.dt_node_to_map = imx_dt_node_to_map,
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.dt_free_map = imx_dt_free_map,
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};
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static int imx_pmx_set_one_pin_mmio(struct imx_pinctrl *ipctl,
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struct imx_pin *pin)
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{
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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struct imx_pin_mmio *pin_mmio = &pin->conf.mmio;
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const struct imx_pin_reg *pin_reg;
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unsigned int pin_id;
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pin_id = pin->pin;
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pin_reg = &ipctl->pin_regs[pin_id];
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if (pin_reg->mux_reg == -1) {
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dev_dbg(ipctl->dev, "Pin(%s) does not support mux function\n",
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info->pins[pin_id].name);
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return 0;
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}
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if (info->flags & SHARE_MUX_CONF_REG) {
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u32 reg;
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reg = readl(ipctl->base + pin_reg->mux_reg);
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reg &= ~info->mux_mask;
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reg |= (pin_mmio->mux_mode << info->mux_shift);
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writel(reg, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, reg);
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} else {
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writel(pin_mmio->mux_mode, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, pin_mmio->mux_mode);
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}
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/*
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* If the select input value begins with 0xff, it's a quirky
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* select input and the value should be interpreted as below.
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* 31 23 15 7 0
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* | 0xff | shift | width | select |
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* It's used to work around the problem that the select
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* input for some pin is not implemented in the select
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* input register but in some general purpose register.
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* We encode the select input value, width and shift of
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* the bit field into input_val cell of pin function ID
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* in device tree, and then decode them here for setting
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* up the select input bits in general purpose register.
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*/
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if (pin_mmio->input_val >> 24 == 0xff) {
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u32 val = pin_mmio->input_val;
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u8 select = val & 0xff;
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u8 width = (val >> 8) & 0xff;
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u8 shift = (val >> 16) & 0xff;
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u32 mask = ((1 << width) - 1) << shift;
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/*
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* The input_reg[i] here is actually some IOMUXC general
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* purpose register, not regular select input register.
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*/
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val = readl(ipctl->base + pin_mmio->input_reg);
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val &= ~mask;
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val |= select << shift;
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writel(val, ipctl->base + pin_mmio->input_reg);
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} else if (pin_mmio->input_reg) {
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/*
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* Regular select input register can never be at offset
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* 0, and we only print register value for regular case.
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*/
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if (ipctl->input_sel_base)
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writel(pin_mmio->input_val, ipctl->input_sel_base +
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pin_mmio->input_reg);
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else
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writel(pin_mmio->input_val, ipctl->base +
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pin_mmio->input_reg);
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dev_dbg(ipctl->dev,
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"==>select_input: offset 0x%x val 0x%x\n",
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pin_mmio->input_reg, pin_mmio->input_val);
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}
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return 0;
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}
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static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
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unsigned group)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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unsigned int npins, pin_id;
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int i;
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struct group_desc *grp = NULL;
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struct function_desc *func = NULL;
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struct function_desc *func;
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struct group_desc *grp;
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struct imx_pin *pin;
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unsigned int npins;
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int i, err;
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/*
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* Configure the mux mode for each pin in the group for a specific
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@ -165,72 +257,16 @@ static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
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func->name, grp->name);
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for (i = 0; i < npins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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pin_id = pin->pin;
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pin_reg = &ipctl->pin_regs[pin_id];
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if (pin_reg->mux_reg == -1) {
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dev_dbg(ipctl->dev, "Pin(%s) does not support mux function\n",
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info->pins[pin_id].name);
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continue;
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}
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if (info->flags & SHARE_MUX_CONF_REG) {
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u32 reg;
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reg = readl(ipctl->base + pin_reg->mux_reg);
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reg &= ~info->mux_mask;
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reg |= (pin->mux_mode << info->mux_shift);
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writel(reg, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, reg);
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} else {
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writel(pin->mux_mode, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, pin->mux_mode);
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}
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/*
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* If the select input value begins with 0xff, it's a quirky
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* select input and the value should be interpreted as below.
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* 31 23 15 7 0
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* | 0xff | shift | width | select |
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* It's used to work around the problem that the select
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* input for some pin is not implemented in the select
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* input register but in some general purpose register.
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* We encode the select input value, width and shift of
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* the bit field into input_val cell of pin function ID
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* in device tree, and then decode them here for setting
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* up the select input bits in general purpose register.
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* For IMX_USE_SCU case, we postpone the mux setting
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* until config is set as we can set them together
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* in one IPC call
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*/
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if (pin->input_val >> 24 == 0xff) {
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u32 val = pin->input_val;
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u8 select = val & 0xff;
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u8 width = (val >> 8) & 0xff;
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u8 shift = (val >> 16) & 0xff;
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u32 mask = ((1 << width) - 1) << shift;
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/*
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* The input_reg[i] here is actually some IOMUXC general
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* purpose register, not regular select input register.
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*/
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val = readl(ipctl->base + pin->input_reg);
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val &= ~mask;
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val |= select << shift;
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writel(val, ipctl->base + pin->input_reg);
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} else if (pin->input_reg) {
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/*
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* Regular select input register can never be at offset
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* 0, and we only print register value for regular case.
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*/
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if (ipctl->input_sel_base)
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writel(pin->input_val, ipctl->input_sel_base +
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pin->input_reg);
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else
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writel(pin->input_val, ipctl->base +
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pin->input_reg);
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dev_dbg(ipctl->dev,
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"==>select_input: offset 0x%x val 0x%x\n",
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pin->input_reg, pin->input_val);
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pin = &((struct imx_pin *)(grp->data))[i];
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if (!(info->flags & IMX_USE_SCU)) {
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err = imx_pmx_set_one_pin_mmio(ipctl, pin);
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if (err)
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return err;
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}
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}
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@ -300,8 +336,8 @@ static u32 imx_pinconf_parse_generic_config(struct device_node *np,
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return imx_pinconf_decode_generic_config(ipctl, configs, num_configs);
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}
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static int imx_pinconf_get(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *config)
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static int imx_pinconf_get_mmio(struct pinctrl_dev *pctldev, unsigned pin_id,
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unsigned long *config)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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@ -321,9 +357,21 @@ static int imx_pinconf_get(struct pinctrl_dev *pctldev,
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return 0;
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}
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static int imx_pinconf_set(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *configs,
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unsigned num_configs)
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static int imx_pinconf_get(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *config)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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if (info->flags & IMX_USE_SCU)
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return imx_pinconf_get_scu(pctldev, pin_id, config);
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else
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return imx_pinconf_get_mmio(pctldev, pin_id, config);
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}
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static int imx_pinconf_set_mmio(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *configs,
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unsigned num_configs)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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@ -358,19 +406,48 @@ static int imx_pinconf_set(struct pinctrl_dev *pctldev,
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return 0;
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}
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static int imx_pinconf_set(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *configs,
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unsigned num_configs)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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if (info->flags & IMX_USE_SCU)
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return imx_pinconf_set_scu(pctldev, pin_id,
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configs, num_configs);
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else
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return imx_pinconf_set_mmio(pctldev, pin_id,
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configs, num_configs);
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}
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static void imx_pinconf_dbg_show(struct pinctrl_dev *pctldev,
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struct seq_file *s, unsigned pin_id)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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const struct imx_pin_reg *pin_reg = &ipctl->pin_regs[pin_id];
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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unsigned long config;
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int ret;
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if (!pin_reg || pin_reg->conf_reg == -1) {
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seq_puts(s, "N/A");
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return;
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if (info->flags & IMX_USE_SCU) {
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ret = imx_pinconf_get_scu(pctldev, pin_id, &config);
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if (ret) {
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dev_err(ipctl->dev, "failed to get %s pinconf\n",
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pin_get_name(pctldev, pin_id));
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seq_puts(s, "N/A");
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return;
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}
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} else {
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pin_reg = &ipctl->pin_regs[pin_id];
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if (!pin_reg || pin_reg->conf_reg == -1) {
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seq_puts(s, "N/A");
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return;
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}
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config = readl(ipctl->base + pin_reg->conf_reg);
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}
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config = readl(ipctl->base + pin_reg->conf_reg);
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seq_printf(s, "0x%lx", config);
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}
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@ -418,9 +495,63 @@ static const struct pinconf_ops imx_pinconf_ops = {
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* <mux_reg conf_reg input_reg mux_mode input_val>
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* SHARE_MUX_CONF_REG:
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* <mux_conf_reg input_reg mux_mode input_val>
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* IMX_USE_SCU:
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* <pin_id mux_mode>
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*/
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#define FSL_PIN_SIZE 24
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#define FSL_PIN_SHARE_SIZE 20
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#define FSL_SCU_PIN_SIZE 12
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static void imx_pinctrl_parse_pin_mmio(struct imx_pinctrl *ipctl,
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unsigned int *pin_id, struct imx_pin *pin,
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const __be32 **list_p,
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struct device_node *np)
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{
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const struct imx_pinctrl_soc_info *info = ipctl->info;
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struct imx_pin_mmio *pin_mmio = &pin->conf.mmio;
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struct imx_pin_reg *pin_reg;
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const __be32 *list = *list_p;
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u32 mux_reg, conf_reg;
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u32 config;
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mux_reg = be32_to_cpu(*list++);
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if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
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mux_reg = -1;
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if (info->flags & SHARE_MUX_CONF_REG) {
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conf_reg = mux_reg;
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} else {
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conf_reg = be32_to_cpu(*list++);
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if (!conf_reg)
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conf_reg = -1;
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}
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*pin_id = (mux_reg != -1) ? mux_reg / 4 : conf_reg / 4;
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pin_reg = &ipctl->pin_regs[*pin_id];
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pin->pin = *pin_id;
|
||||
pin_reg->mux_reg = mux_reg;
|
||||
pin_reg->conf_reg = conf_reg;
|
||||
pin_mmio->input_reg = be32_to_cpu(*list++);
|
||||
pin_mmio->mux_mode = be32_to_cpu(*list++);
|
||||
pin_mmio->input_val = be32_to_cpu(*list++);
|
||||
|
||||
if (info->generic_pinconf) {
|
||||
/* generic pin config decoded */
|
||||
pin_mmio->config = imx_pinconf_parse_generic_config(np, ipctl);
|
||||
} else {
|
||||
/* legacy pin config read from devicetree */
|
||||
config = be32_to_cpu(*list++);
|
||||
|
||||
/* SION bit is in mux register */
|
||||
if (config & IMX_PAD_SION)
|
||||
pin_mmio->mux_mode |= IOMUXC_CONFIG_SION;
|
||||
pin_mmio->config = config & ~IMX_PAD_SION;
|
||||
}
|
||||
|
||||
dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[*pin_id].name,
|
||||
pin_mmio->mux_mode, pin_mmio->config);
|
||||
}
|
||||
|
||||
static int imx_pinctrl_parse_groups(struct device_node *np,
|
||||
struct group_desc *grp,
|
||||
@ -428,14 +559,16 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
|
||||
u32 index)
|
||||
{
|
||||
const struct imx_pinctrl_soc_info *info = ipctl->info;
|
||||
struct imx_pin *pin;
|
||||
int size, pin_size;
|
||||
const __be32 *list;
|
||||
int i;
|
||||
u32 config;
|
||||
|
||||
dev_dbg(ipctl->dev, "group(%d): %pOFn\n", index, np);
|
||||
|
||||
if (info->flags & SHARE_MUX_CONF_REG)
|
||||
if (info->flags & IMX_USE_SCU)
|
||||
pin_size = FSL_SCU_PIN_SIZE;
|
||||
else if (info->flags & SHARE_MUX_CONF_REG)
|
||||
pin_size = FSL_PIN_SHARE_SIZE;
|
||||
else
|
||||
pin_size = FSL_PIN_SIZE;
|
||||
@ -472,9 +605,6 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* first try to parse the generic pin config */
|
||||
config = imx_pinconf_parse_generic_config(np, ipctl);
|
||||
|
||||
grp->num_pins = size / pin_size;
|
||||
grp->data = devm_kcalloc(ipctl->dev,
|
||||
grp->num_pins, sizeof(struct imx_pin),
|
||||
@ -486,48 +616,13 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < grp->num_pins; i++) {
|
||||
u32 mux_reg = be32_to_cpu(*list++);
|
||||
u32 conf_reg;
|
||||
unsigned int pin_id;
|
||||
struct imx_pin_reg *pin_reg;
|
||||
struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
|
||||
|
||||
if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
|
||||
mux_reg = -1;
|
||||
|
||||
if (info->flags & SHARE_MUX_CONF_REG) {
|
||||
conf_reg = mux_reg;
|
||||
} else {
|
||||
conf_reg = be32_to_cpu(*list++);
|
||||
if (!conf_reg)
|
||||
conf_reg = -1;
|
||||
}
|
||||
|
||||
pin_id = (mux_reg != -1) ? mux_reg / 4 : conf_reg / 4;
|
||||
pin_reg = &ipctl->pin_regs[pin_id];
|
||||
pin->pin = pin_id;
|
||||
grp->pins[i] = pin_id;
|
||||
pin_reg->mux_reg = mux_reg;
|
||||
pin_reg->conf_reg = conf_reg;
|
||||
pin->input_reg = be32_to_cpu(*list++);
|
||||
pin->mux_mode = be32_to_cpu(*list++);
|
||||
pin->input_val = be32_to_cpu(*list++);
|
||||
|
||||
if (info->generic_pinconf) {
|
||||
/* generic pin config decoded */
|
||||
pin->config = config;
|
||||
} else {
|
||||
/* legacy pin config read from devicetree */
|
||||
config = be32_to_cpu(*list++);
|
||||
|
||||
/* SION bit is in mux register */
|
||||
if (config & IMX_PAD_SION)
|
||||
pin->mux_mode |= IOMUXC_CONFIG_SION;
|
||||
pin->config = config & ~IMX_PAD_SION;
|
||||
}
|
||||
|
||||
dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[pin_id].name,
|
||||
pin->mux_mode, pin->config);
|
||||
pin = &((struct imx_pin *)(grp->data))[i];
|
||||
if (info->flags & IMX_USE_SCU)
|
||||
imx_pinctrl_parse_pin_scu(ipctl, &grp->pins[i],
|
||||
pin, &list);
|
||||
else
|
||||
imx_pinctrl_parse_pin_mmio(ipctl, &grp->pins[i],
|
||||
pin, &list, np);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -699,35 +794,37 @@ int imx_pinctrl_probe(struct platform_device *pdev,
|
||||
if (!ipctl)
|
||||
return -ENOMEM;
|
||||
|
||||
ipctl->pin_regs = devm_kmalloc_array(&pdev->dev,
|
||||
info->npins, sizeof(*ipctl->pin_regs),
|
||||
GFP_KERNEL);
|
||||
if (!ipctl->pin_regs)
|
||||
return -ENOMEM;
|
||||
if (!(info->flags & IMX_USE_SCU)) {
|
||||
ipctl->pin_regs = devm_kmalloc_array(&pdev->dev, info->npins,
|
||||
sizeof(*ipctl->pin_regs),
|
||||
GFP_KERNEL);
|
||||
if (!ipctl->pin_regs)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < info->npins; i++) {
|
||||
ipctl->pin_regs[i].mux_reg = -1;
|
||||
ipctl->pin_regs[i].conf_reg = -1;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
ipctl->base = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(ipctl->base))
|
||||
return PTR_ERR(ipctl->base);
|
||||
|
||||
if (of_property_read_bool(dev_np, "fsl,input-sel")) {
|
||||
np = of_parse_phandle(dev_np, "fsl,input-sel", 0);
|
||||
if (!np) {
|
||||
dev_err(&pdev->dev, "iomuxc fsl,input-sel property not found\n");
|
||||
return -EINVAL;
|
||||
for (i = 0; i < info->npins; i++) {
|
||||
ipctl->pin_regs[i].mux_reg = -1;
|
||||
ipctl->pin_regs[i].conf_reg = -1;
|
||||
}
|
||||
|
||||
ipctl->input_sel_base = of_iomap(np, 0);
|
||||
of_node_put(np);
|
||||
if (!ipctl->input_sel_base) {
|
||||
dev_err(&pdev->dev,
|
||||
"iomuxc input select base address not found\n");
|
||||
return -ENOMEM;
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
ipctl->base = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(ipctl->base))
|
||||
return PTR_ERR(ipctl->base);
|
||||
|
||||
if (of_property_read_bool(dev_np, "fsl,input-sel")) {
|
||||
np = of_parse_phandle(dev_np, "fsl,input-sel", 0);
|
||||
if (!np) {
|
||||
dev_err(&pdev->dev, "iomuxc fsl,input-sel property not found\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ipctl->input_sel_base = of_iomap(np, 0);
|
||||
of_node_put(np);
|
||||
if (!ipctl->input_sel_base) {
|
||||
dev_err(&pdev->dev,
|
||||
"iomuxc input select base address not found\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -19,22 +19,43 @@ struct platform_device;
|
||||
extern struct pinmux_ops imx_pmx_ops;
|
||||
|
||||
/**
|
||||
* struct imx_pin - describes a single i.MX pin
|
||||
* @pin: the pin_id of this pin
|
||||
* struct imx_pin_mmio - MMIO pin configurations
|
||||
* @mux_mode: the mux mode for this pin.
|
||||
* @input_reg: the select input register offset for this pin if any
|
||||
* 0 if no select input setting needed.
|
||||
* @input_val: the select input value for this pin.
|
||||
* @configs: the config for this pin.
|
||||
*/
|
||||
struct imx_pin {
|
||||
unsigned int pin;
|
||||
struct imx_pin_mmio {
|
||||
unsigned int mux_mode;
|
||||
u16 input_reg;
|
||||
unsigned int input_val;
|
||||
unsigned long config;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct imx_pin_scu - SCU pin configurations
|
||||
* @mux: the mux mode for this pin.
|
||||
* @configs: the config for this pin.
|
||||
*/
|
||||
struct imx_pin_scu {
|
||||
unsigned int mux_mode;
|
||||
unsigned long config;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct imx_pin - describes a single i.MX pin
|
||||
* @pin: the pin_id of this pin
|
||||
* @conf: config type of this pin, either mmio or scu
|
||||
*/
|
||||
struct imx_pin {
|
||||
unsigned int pin;
|
||||
union {
|
||||
struct imx_pin_mmio mmio;
|
||||
struct imx_pin_scu scu;
|
||||
} conf;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct imx_pin_reg - describe a pin reg map
|
||||
* @mux_reg: mux register offset
|
||||
@ -99,8 +120,9 @@ struct imx_pinctrl {
|
||||
#define IMX_CFG_PARAMS_DECODE_INVERT(p, m, o) \
|
||||
{ .param = p, .mask = m, .shift = o, .invert = true, }
|
||||
|
||||
#define SHARE_MUX_CONF_REG 0x1
|
||||
#define ZERO_OFFSET_VALID 0x2
|
||||
#define SHARE_MUX_CONF_REG BIT(0)
|
||||
#define ZERO_OFFSET_VALID BIT(1)
|
||||
#define IMX_USE_SCU BIT(2)
|
||||
|
||||
#define NO_MUX 0x0
|
||||
#define NO_PAD 0x0
|
||||
@ -113,4 +135,37 @@ struct imx_pinctrl {
|
||||
|
||||
int imx_pinctrl_probe(struct platform_device *pdev,
|
||||
const struct imx_pinctrl_soc_info *info);
|
||||
|
||||
#ifdef CONFIG_PINCTRL_IMX_SCU
|
||||
#define BM_PAD_CTL_GP_ENABLE BIT(30)
|
||||
#define BM_PAD_CTL_IFMUX_ENABLE BIT(31)
|
||||
#define BP_PAD_CTL_IFMUX 27
|
||||
|
||||
int imx_pinctrl_sc_ipc_init(struct platform_device *pdev);
|
||||
int imx_pinconf_get_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
|
||||
unsigned long *config);
|
||||
int imx_pinconf_set_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
|
||||
unsigned long *configs, unsigned num_configs);
|
||||
void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
|
||||
unsigned int *pin_id, struct imx_pin *pin,
|
||||
const __be32 **list_p);
|
||||
#else
|
||||
static inline int imx_pinconf_get_scu(struct pinctrl_dev *pctldev,
|
||||
unsigned pin_id, unsigned long *config)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
static inline int imx_pinconf_set_scu(struct pinctrl_dev *pctldev,
|
||||
unsigned pin_id, unsigned long *configs,
|
||||
unsigned num_configs)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
static inline void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
|
||||
unsigned int *pin_id,
|
||||
struct imx_pin *pin,
|
||||
const __be32 **list_p)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
#endif /* __DRIVERS_PINCTRL_IMX_H */
|
||||
|
||||
121
drivers/pinctrl/freescale/pinctrl-scu.c
Normal file
121
drivers/pinctrl/freescale/pinctrl-scu.c
Normal file
@ -0,0 +1,121 @@
|
||||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* Copyright (C) 2016 Freescale Semiconductor, Inc.
|
||||
* Copyright 2017-2018 NXP
|
||||
* Dong Aisheng <aisheng.dong@nxp.com>
|
||||
*/
|
||||
|
||||
#include <linux/err.h>
|
||||
#include <linux/firmware/imx/sci.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/pinctrl/pinctrl.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include "../core.h"
|
||||
#include "pinctrl-imx.h"
|
||||
|
||||
enum pad_func_e {
|
||||
IMX_SC_PAD_FUNC_SET = 15,
|
||||
IMX_SC_PAD_FUNC_GET = 16,
|
||||
};
|
||||
|
||||
struct imx_sc_msg_req_pad_set {
|
||||
struct imx_sc_rpc_msg hdr;
|
||||
u32 val;
|
||||
u16 pad;
|
||||
} __packed;
|
||||
|
||||
struct imx_sc_msg_req_pad_get {
|
||||
struct imx_sc_rpc_msg hdr;
|
||||
u16 pad;
|
||||
} __packed;
|
||||
|
||||
struct imx_sc_msg_resp_pad_get {
|
||||
struct imx_sc_rpc_msg hdr;
|
||||
u32 val;
|
||||
} __packed;
|
||||
|
||||
struct imx_sc_ipc *pinctrl_ipc_handle;
|
||||
|
||||
int imx_pinctrl_sc_ipc_init(struct platform_device *pdev)
|
||||
{
|
||||
return imx_scu_get_handle(&pinctrl_ipc_handle);
|
||||
}
|
||||
|
||||
int imx_pinconf_get_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
|
||||
unsigned long *config)
|
||||
{
|
||||
struct imx_sc_msg_req_pad_get msg;
|
||||
struct imx_sc_msg_resp_pad_get *resp;
|
||||
struct imx_sc_rpc_msg *hdr = &msg.hdr;
|
||||
int ret;
|
||||
|
||||
hdr->ver = IMX_SC_RPC_VERSION;
|
||||
hdr->svc = IMX_SC_RPC_SVC_PAD;
|
||||
hdr->func = IMX_SC_PAD_FUNC_GET;
|
||||
hdr->size = 2;
|
||||
|
||||
msg.pad = pin_id;
|
||||
|
||||
ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
resp = (struct imx_sc_msg_resp_pad_get *)&msg;
|
||||
*config = resp->val;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int imx_pinconf_set_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
|
||||
unsigned long *configs, unsigned num_configs)
|
||||
{
|
||||
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
|
||||
struct imx_sc_msg_req_pad_set msg;
|
||||
struct imx_sc_rpc_msg *hdr = &msg.hdr;
|
||||
unsigned int mux = configs[0];
|
||||
unsigned int conf = configs[1];
|
||||
unsigned int val;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* Set mux and conf together in one IPC call
|
||||
*/
|
||||
WARN_ON(num_configs != 2);
|
||||
|
||||
val = conf | BM_PAD_CTL_IFMUX_ENABLE | BM_PAD_CTL_GP_ENABLE;
|
||||
val |= mux << BP_PAD_CTL_IFMUX;
|
||||
|
||||
hdr->ver = IMX_SC_RPC_VERSION;
|
||||
hdr->svc = IMX_SC_RPC_SVC_PAD;
|
||||
hdr->func = IMX_SC_PAD_FUNC_SET;
|
||||
hdr->size = 3;
|
||||
|
||||
msg.pad = pin_id;
|
||||
msg.val = val;
|
||||
|
||||
ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
|
||||
|
||||
dev_dbg(ipctl->dev, "write: pin_id %u config 0x%x val 0x%x\n",
|
||||
pin_id, conf, val);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
|
||||
unsigned int *pin_id, struct imx_pin *pin,
|
||||
const __be32 **list_p)
|
||||
{
|
||||
const struct imx_pinctrl_soc_info *info = ipctl->info;
|
||||
struct imx_pin_scu *pin_scu = &pin->conf.scu;
|
||||
const __be32 *list = *list_p;
|
||||
|
||||
pin->pin = be32_to_cpu(*list++);
|
||||
*pin_id = pin->pin;
|
||||
pin_scu->mux_mode = be32_to_cpu(*list++);
|
||||
pin_scu->config = be32_to_cpu(*list++);
|
||||
*list_p = list;
|
||||
|
||||
dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[pin->pin].name,
|
||||
pin_scu->mux_mode, pin_scu->config);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user