mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 02:52:22 +00:00
staging: mt7621-pci: use PERST_N instead of gpio control
Driver is using gpio control instead of each port PERST_N bit. Use PERST_N bit of each port cleaning all the ugly gpio code in driver probe function. Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
fb672b450c
commit
bd1a05bd87
@ -18,6 +18,7 @@
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/iopoll.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_address.h>
|
||||
@ -36,7 +37,6 @@
|
||||
#define MT7621_CHIP_REV_ID 0x0c
|
||||
#define RALINK_CLKCFG1 0x30
|
||||
#define RALINK_RSTCTRL 0x34
|
||||
#define MT7621_GPIO_MODE 0x60
|
||||
#define CHIP_REV_MT7621_E2 0x0101
|
||||
|
||||
/* RALINK_RSTCTRL bits */
|
||||
@ -86,6 +86,8 @@
|
||||
#define PCIE_BAR_ENABLE BIT(0)
|
||||
#define PCIE_PORT_INT_EN(x) BIT(20 + (x))
|
||||
#define PCIE_PORT_CLK_EN(x) BIT(24 + (x))
|
||||
#define PCIE_PORT_PERST(x) BIT(1 + (x))
|
||||
#define PCIE_PORT_LINKUP BIT(0)
|
||||
|
||||
#define PCIE_CLK_GEN_EN BIT(31)
|
||||
#define PCIE_CLK_GEN_DIS 0
|
||||
@ -638,12 +640,33 @@ static void mt7621_pcie_enable_ports(struct mt7621_pcie *pcie)
|
||||
u32 offset;
|
||||
u32 slot;
|
||||
u32 val;
|
||||
int err;
|
||||
|
||||
list_for_each_entry(port, &pcie->ports, list) {
|
||||
slot = port->slot;
|
||||
offset = MT7621_PCIE_OFFSET + (slot * MT7621_NEXT_PORT);
|
||||
|
||||
if (port->enabled) {
|
||||
/* assert port PERST_N */
|
||||
val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
|
||||
val |= PCIE_PORT_PERST(slot);
|
||||
pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
|
||||
|
||||
/* de-assert port PERST_N */
|
||||
val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
|
||||
val &= ~PCIE_PORT_PERST(slot);
|
||||
pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
|
||||
|
||||
/* 100ms timeout value should be enough for Gen1 training */
|
||||
err = readl_poll_timeout(port->base + RALINK_PCI_STATUS,
|
||||
val,!!(val & PCIE_PORT_LINKUP),
|
||||
20, 100 * USEC_PER_MSEC);
|
||||
if (err) {
|
||||
dev_err(dev, "de-assert port %d PERST_N\n",
|
||||
slot);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* map 2G DDR region */
|
||||
pcie_write(pcie, PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE,
|
||||
offset + RALINK_PCI_BAR0SETUP_ADDR);
|
||||
@ -765,16 +788,6 @@ static int mt7621_pcie_register_host(struct pci_host_bridge *host,
|
||||
return pci_host_probe(host);
|
||||
}
|
||||
|
||||
static void mt7621_set_gpio_mode(struct mt7621_pcie *pcie)
|
||||
{
|
||||
u32 reg = ioread32(pcie->sysctl + MT7621_GPIO_MODE);
|
||||
|
||||
reg &= ~(0x3 << 10 | 0x3 << 3);
|
||||
reg |= (BIT(10) | BIT(3));
|
||||
iowrite32(reg, pcie->sysctl + MT7621_GPIO_MODE);
|
||||
mdelay(100);
|
||||
}
|
||||
|
||||
static int mt7621_pci_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
@ -807,13 +820,6 @@ static int mt7621_pci_probe(struct platform_device *pdev)
|
||||
ioport_resource.start = 0;
|
||||
ioport_resource.end = ~0UL; /* no limit */
|
||||
|
||||
mt7621_set_gpio_mode(pcie);
|
||||
*(unsigned int *)(0xbe000600) |= BIT(19) | BIT(8) | BIT(7); // use GPIO19/GPIO8/GPIO7 (PERST_N/UART_RXD3/UART_TXD3)
|
||||
mdelay(100);
|
||||
*(unsigned int *)(0xbe000620) &= ~(BIT(19) | BIT(8) | BIT(7)); // clear DATA
|
||||
|
||||
mdelay(100);
|
||||
|
||||
mt7621_pcie_init_ports(pcie);
|
||||
|
||||
rt_sysc_m32(0, RALINK_PCIE_RST, RALINK_RSTCTRL);
|
||||
@ -826,10 +832,6 @@ static int mt7621_pci_probe(struct platform_device *pdev)
|
||||
mdelay(50);
|
||||
rt_sysc_m32(RALINK_PCIE_RST, 0, RALINK_RSTCTRL);
|
||||
|
||||
/* Use GPIO control instead of PERST_N */
|
||||
*(unsigned int *)(0xbe000620) |= BIT(19) | BIT(8) | BIT(7); // set DATA
|
||||
mdelay(1000);
|
||||
|
||||
err = mt7621_pcie_init_virtual_bridges(pcie);
|
||||
if (err) {
|
||||
dev_err(dev, "Nothing is connected in virtual bridges. Exiting...");
|
||||
|
Loading…
Reference in New Issue
Block a user