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linux/arch/c6x/platforms/plldata.c
Ken Cox dbe91a2e6e C6X: add basic support for TMS320C6678 SoC 
This patch adds support for the TMS320C6678 SoC on an EVMC6678LE
evaluation board. The 6678 is a C66x family CPU which is very similar
to the already supported C64x CPUs with the addition of floating point
instructions.

Signed-off-by: Ken Cox <jkc@redhat.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
CC: Aurelien Jacquiot <a-jacquiot@ti.com>
CC: linux-c6x-dev@linux-c6x.org
2012-07-18 23:52:31 -04:00

470 lines
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/*
* Port on Texas Instruments TMS320C6x architecture
*
* Copyright (C) 2011 Texas Instruments Incorporated
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/clock.h>
#include <asm/setup.h>
#include <asm/irq.h>
/*
* Common SoC clock support.
*/
/* Default input for PLL1 */
struct clk clkin1 = {
.name = "clkin1",
.node = LIST_HEAD_INIT(clkin1.node),
.children = LIST_HEAD_INIT(clkin1.children),
.childnode = LIST_HEAD_INIT(clkin1.childnode),
};
struct pll_data c6x_soc_pll1 = {
.num = 1,
.sysclks = {
{
.name = "pll1",
.parent = &clkin1,
.pll_data = &c6x_soc_pll1,
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk1",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk2",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk3",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk4",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk5",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk6",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk7",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk8",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk9",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk10",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk11",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk12",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk13",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk14",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk15",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
{
.name = "pll1_sysclk16",
.parent = &c6x_soc_pll1.sysclks[0],
.flags = CLK_PLL,
},
},
};
/* CPU core clock */
struct clk c6x_core_clk = {
.name = "core",
};
/* miscellaneous IO clocks */
struct clk c6x_i2c_clk = {
.name = "i2c",
};
struct clk c6x_watchdog_clk = {
.name = "watchdog",
};
struct clk c6x_mcbsp1_clk = {
.name = "mcbsp1",
};
struct clk c6x_mcbsp2_clk = {
.name = "mcbsp2",
};
struct clk c6x_mdio_clk = {
.name = "mdio",
};
#ifdef CONFIG_SOC_TMS320C6455
static struct clk_lookup c6455_clks[] = {
CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
CLK(NULL, "core", &c6x_core_clk),
CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
CLK("watchdog", NULL, &c6x_watchdog_clk),
CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
CLK("", NULL, NULL)
};
static void __init c6455_setup_clocks(struct device_node *node)
{
struct pll_data *pll = &c6x_soc_pll1;
struct clk *sysclks = pll->sysclks;
pll->flags = PLL_HAS_PRE | PLL_HAS_MUL;
sysclks[2].flags |= FIXED_DIV_PLL;
sysclks[2].div = 3;
sysclks[3].flags |= FIXED_DIV_PLL;
sysclks[3].div = 6;
sysclks[4].div = PLLDIV4;
sysclks[5].div = PLLDIV5;
c6x_core_clk.parent = &sysclks[0];
c6x_i2c_clk.parent = &sysclks[3];
c6x_watchdog_clk.parent = &sysclks[3];
c6x_mdio_clk.parent = &sysclks[3];
c6x_clks_init(c6455_clks);
}
#endif /* CONFIG_SOC_TMS320C6455 */
#ifdef CONFIG_SOC_TMS320C6457
static struct clk_lookup c6457_clks[] = {
CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
CLK(NULL, "core", &c6x_core_clk),
CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
CLK("watchdog", NULL, &c6x_watchdog_clk),
CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
CLK("", NULL, NULL)
};
static void __init c6457_setup_clocks(struct device_node *node)
{
struct pll_data *pll = &c6x_soc_pll1;
struct clk *sysclks = pll->sysclks;
pll->flags = PLL_HAS_MUL | PLL_HAS_POST;
sysclks[1].flags |= FIXED_DIV_PLL;
sysclks[1].div = 1;
sysclks[2].flags |= FIXED_DIV_PLL;
sysclks[2].div = 3;
sysclks[3].flags |= FIXED_DIV_PLL;
sysclks[3].div = 6;
sysclks[4].div = PLLDIV4;
sysclks[5].div = PLLDIV5;
c6x_core_clk.parent = &sysclks[1];
c6x_i2c_clk.parent = &sysclks[3];
c6x_watchdog_clk.parent = &sysclks[5];
c6x_mdio_clk.parent = &sysclks[5];
c6x_clks_init(c6457_clks);
}
#endif /* CONFIG_SOC_TMS320C6455 */
#ifdef CONFIG_SOC_TMS320C6472
static struct clk_lookup c6472_clks[] = {
CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]),
CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]),
CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
CLK(NULL, "core", &c6x_core_clk),
CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
CLK("watchdog", NULL, &c6x_watchdog_clk),
CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
CLK("", NULL, NULL)
};
/* assumptions used for delay loop calculations */
#define MIN_CLKIN1_KHz 15625
#define MAX_CORE_KHz 700000
#define MIN_PLLOUT_KHz MIN_CLKIN1_KHz
static void __init c6472_setup_clocks(struct device_node *node)
{
struct pll_data *pll = &c6x_soc_pll1;
struct clk *sysclks = pll->sysclks;
int i;
pll->flags = PLL_HAS_MUL;
for (i = 1; i <= 6; i++) {
sysclks[i].flags |= FIXED_DIV_PLL;
sysclks[i].div = 1;
}
sysclks[7].flags |= FIXED_DIV_PLL;
sysclks[7].div = 3;
sysclks[8].flags |= FIXED_DIV_PLL;
sysclks[8].div = 6;
sysclks[9].flags |= FIXED_DIV_PLL;
sysclks[9].div = 2;
sysclks[10].div = PLLDIV10;
c6x_core_clk.parent = &sysclks[get_coreid() + 1];
c6x_i2c_clk.parent = &sysclks[8];
c6x_watchdog_clk.parent = &sysclks[8];
c6x_mdio_clk.parent = &sysclks[5];
c6x_clks_init(c6472_clks);
}
#endif /* CONFIG_SOC_TMS320C6472 */
#ifdef CONFIG_SOC_TMS320C6474
static struct clk_lookup c6474_clks[] = {
CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]),
CLK(NULL, "pll1_sysclk12", &c6x_soc_pll1.sysclks[12]),
CLK(NULL, "pll1_sysclk13", &c6x_soc_pll1.sysclks[13]),
CLK(NULL, "core", &c6x_core_clk),
CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
CLK("mcbsp.1", NULL, &c6x_mcbsp1_clk),
CLK("mcbsp.2", NULL, &c6x_mcbsp2_clk),
CLK("watchdog", NULL, &c6x_watchdog_clk),
CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
CLK("", NULL, NULL)
};
static void __init c6474_setup_clocks(struct device_node *node)
{
struct pll_data *pll = &c6x_soc_pll1;
struct clk *sysclks = pll->sysclks;
pll->flags = PLL_HAS_MUL;
sysclks[7].flags |= FIXED_DIV_PLL;
sysclks[7].div = 1;
sysclks[9].flags |= FIXED_DIV_PLL;
sysclks[9].div = 3;
sysclks[10].flags |= FIXED_DIV_PLL;
sysclks[10].div = 6;
sysclks[11].div = PLLDIV11;
sysclks[12].flags |= FIXED_DIV_PLL;
sysclks[12].div = 2;
sysclks[13].div = PLLDIV13;
c6x_core_clk.parent = &sysclks[7];
c6x_i2c_clk.parent = &sysclks[10];
c6x_watchdog_clk.parent = &sysclks[10];
c6x_mcbsp1_clk.parent = &sysclks[10];
c6x_mcbsp2_clk.parent = &sysclks[10];
c6x_clks_init(c6474_clks);
}
#endif /* CONFIG_SOC_TMS320C6474 */
#ifdef CONFIG_SOC_TMS320C6678
static struct clk_lookup c6678_clks[] = {
CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
CLK(NULL, "pll1_refclk", &c6x_soc_pll1.sysclks[1]),
CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]),
CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]),
CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]),
CLK(NULL, "core", &c6x_core_clk),
CLK("", NULL, NULL)
};
static void __init c6678_setup_clocks(struct device_node *node)
{
struct pll_data *pll = &c6x_soc_pll1;
struct clk *sysclks = pll->sysclks;
pll->flags = PLL_HAS_MUL;
sysclks[1].flags |= FIXED_DIV_PLL;
sysclks[1].div = 1;
sysclks[2].div = PLLDIV2;
sysclks[3].flags |= FIXED_DIV_PLL;
sysclks[3].div = 2;
sysclks[4].flags |= FIXED_DIV_PLL;
sysclks[4].div = 3;
sysclks[5].div = PLLDIV5;
sysclks[6].flags |= FIXED_DIV_PLL;
sysclks[6].div = 64;
sysclks[7].flags |= FIXED_DIV_PLL;
sysclks[7].div = 6;
sysclks[8].div = PLLDIV8;
sysclks[9].flags |= FIXED_DIV_PLL;
sysclks[9].div = 12;
sysclks[10].flags |= FIXED_DIV_PLL;
sysclks[10].div = 3;
sysclks[11].flags |= FIXED_DIV_PLL;
sysclks[11].div = 6;
c6x_core_clk.parent = &sysclks[0];
c6x_i2c_clk.parent = &sysclks[7];
c6x_clks_init(c6678_clks);
}
#endif /* CONFIG_SOC_TMS320C6678 */
static struct of_device_id c6x_clkc_match[] __initdata = {
#ifdef CONFIG_SOC_TMS320C6455
{ .compatible = "ti,c6455-pll", .data = c6455_setup_clocks },
#endif
#ifdef CONFIG_SOC_TMS320C6457
{ .compatible = "ti,c6457-pll", .data = c6457_setup_clocks },
#endif
#ifdef CONFIG_SOC_TMS320C6472
{ .compatible = "ti,c6472-pll", .data = c6472_setup_clocks },
#endif
#ifdef CONFIG_SOC_TMS320C6474
{ .compatible = "ti,c6474-pll", .data = c6474_setup_clocks },
#endif
#ifdef CONFIG_SOC_TMS320C6678
{ .compatible = "ti,c6678-pll", .data = c6678_setup_clocks },
#endif
{ .compatible = "ti,c64x+pll" },
{}
};
void __init c64x_setup_clocks(void)
{
void (*__setup_clocks)(struct device_node *np);
struct pll_data *pll = &c6x_soc_pll1;
struct device_node *node;
const struct of_device_id *id;
int err;
u32 val;
node = of_find_matching_node(NULL, c6x_clkc_match);
if (!node)
return;
pll->base = of_iomap(node, 0);
if (!pll->base)
goto out;
err = of_property_read_u32(node, "clock-frequency", &val);
if (err || val == 0) {
pr_err("%s: no clock-frequency found! Using %dMHz\n",
node->full_name, (int)val / 1000000);
val = 25000000;
}
clkin1.rate = val;
err = of_property_read_u32(node, "ti,c64x+pll-bypass-delay", &val);
if (err)
val = 5000;
pll->bypass_delay = val;
err = of_property_read_u32(node, "ti,c64x+pll-reset-delay", &val);
if (err)
val = 30000;
pll->reset_delay = val;
err = of_property_read_u32(node, "ti,c64x+pll-lock-delay", &val);
if (err)
val = 30000;
pll->lock_delay = val;
/* id->data is a pointer to SoC-specific setup */
id = of_match_node(c6x_clkc_match, node);
if (id && id->data) {
__setup_clocks = id->data;
__setup_clocks(node);
}
out:
of_node_put(node);
}
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