dm646x.c

/*
 * TI DaVinci DM644x chip specific setup
 *
 * Author: Kevin Hilman, Deep Root Systems, LLC
 *
 * 2007 (c) Deep Root Systems, LLC. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/platform_device.h>

#include <asm/mach/map.h>

#include <mach/dm646x.h>
#include <mach/clock.h>
#include <mach/cputype.h>
#include <mach/edma.h>
#include <mach/irqs.h>
#include <mach/psc.h>
#include <mach/mux.h>
#include <mach/common.h>

#include "clock.h"
#include "mux.h"

/*
 * Device specific clocks
 */
#define DM646X_REF_FREQ		27000000
#define DM646X_AUX_FREQ		24000000

static struct pll_data pll1_data = {
	.num       = 1,
	.phys_base = DAVINCI_PLL1_BASE,
};

static struct pll_data pll2_data = {
	.num       = 2,
	.phys_base = DAVINCI_PLL2_BASE,
};

static struct clk ref_clk = {
	.name = "ref_clk",
	.rate = DM646X_REF_FREQ,
};

static struct clk aux_clkin = {
	.name = "aux_clkin",
	.rate = DM646X_AUX_FREQ,
};

static struct clk pll1_clk = {
	.name = "pll1",
	.parent = &ref_clk,
	.pll_data = &pll1_data,
	.flags = CLK_PLL,
};

static struct clk pll1_sysclk1 = {
	.name = "pll1_sysclk1",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV1,
};

static struct clk pll1_sysclk2 = {
	.name = "pll1_sysclk2",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV2,
};

static struct clk pll1_sysclk3 = {
	.name = "pll1_sysclk3",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV3,
};

static struct clk pll1_sysclk4 = {
	.name = "pll1_sysclk4",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV4,
};

static struct clk pll1_sysclk5 = {
	.name = "pll1_sysclk5",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV5,
};

static struct clk pll1_sysclk6 = {
	.name = "pll1_sysclk6",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV6,
};

static struct clk pll1_sysclk8 = {
	.name = "pll1_sysclk8",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV8,
};

static struct clk pll1_sysclk9 = {
	.name = "pll1_sysclk9",
	.parent = &pll1_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV9,
};

static struct clk pll1_sysclkbp = {
	.name = "pll1_sysclkbp",
	.parent = &pll1_clk,
	.flags = CLK_PLL | PRE_PLL,
	.div_reg = BPDIV,
};

static struct clk pll1_aux_clk = {
	.name = "pll1_aux_clk",
	.parent = &pll1_clk,
	.flags = CLK_PLL | PRE_PLL,
};

static struct clk pll2_clk = {
	.name = "pll2_clk",
	.parent = &ref_clk,
	.pll_data = &pll2_data,
	.flags = CLK_PLL,
};

static struct clk pll2_sysclk1 = {
	.name = "pll2_sysclk1",
	.parent = &pll2_clk,
	.flags = CLK_PLL,
	.div_reg = PLLDIV1,
};

static struct clk dsp_clk = {
	.name = "dsp",
	.parent = &pll1_sysclk1,
	.lpsc = DM646X_LPSC_C64X_CPU,
	.flags = PSC_DSP,
	.usecount = 1,			/* REVISIT how to disable? */
};

static struct clk arm_clk = {
	.name = "arm",
	.parent = &pll1_sysclk2,
	.lpsc = DM646X_LPSC_ARM,
	.flags = ALWAYS_ENABLED,
};

static struct clk uart0_clk = {
	.name = "uart0",
	.parent = &aux_clkin,
	.lpsc = DM646X_LPSC_UART0,
};

static struct clk uart1_clk = {
	.name = "uart1",
	.parent = &aux_clkin,
	.lpsc = DM646X_LPSC_UART1,
};

static struct clk uart2_clk = {
	.name = "uart2",
	.parent = &aux_clkin,
	.lpsc = DM646X_LPSC_UART2,
};

static struct clk i2c_clk = {
	.name = "I2CCLK",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_I2C,
};

static struct clk gpio_clk = {
	.name = "gpio",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_GPIO,
};

static struct clk aemif_clk = {
	.name = "aemif",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_AEMIF,
	.flags = ALWAYS_ENABLED,
};

static struct clk emac_clk = {
	.name = "emac",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_EMAC,
};

static struct clk pwm0_clk = {
	.name = "pwm0",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_PWM0,
	.usecount = 1,            /* REVIST: disabling hangs system */
};

static struct clk pwm1_clk = {
	.name = "pwm1",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_PWM1,
	.usecount = 1,            /* REVIST: disabling hangs system */
};

static struct clk timer0_clk = {
	.name = "timer0",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_TIMER0,
};

static struct clk timer1_clk = {
	.name = "timer1",
	.parent = &pll1_sysclk3,
	.lpsc = DM646X_LPSC_TIMER1,
};

static struct clk timer2_clk = {
	.name = "timer2",
	.parent = &pll1_sysclk3,
	.flags = ALWAYS_ENABLED, /* no LPSC, always enabled; c.f. spruep9a */
};

static struct clk vpif0_clk = {
	.name = "vpif0",
	.parent = &ref_clk,
	.lpsc = DM646X_LPSC_VPSSMSTR,
	.flags = ALWAYS_ENABLED,
};

static struct clk vpif1_clk = {
	.name = "vpif1",
	.parent = &ref_clk,
	.lpsc = DM646X_LPSC_VPSSSLV,
	.flags = ALWAYS_ENABLED,
};

struct davinci_clk dm646x_clks[] = {
	CLK(NULL, "ref", &ref_clk),
	CLK(NULL, "aux", &aux_clkin),
	CLK(NULL, "pll1", &pll1_clk),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk1),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk2),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk3),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk4),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk5),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk6),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk8),
	CLK(NULL, "pll1_sysclk", &pll1_sysclk9),
	CLK(NULL, "pll1_sysclk", &pll1_sysclkbp),
	CLK(NULL, "pll1_aux", &pll1_aux_clk),
	CLK(NULL, "pll2", &pll2_clk),
	CLK(NULL, "pll2_sysclk1", &pll2_sysclk1),
	CLK(NULL, "dsp", &dsp_clk),
	CLK(NULL, "arm", &arm_clk),
	CLK(NULL, "uart0", &uart0_clk),
	CLK(NULL, "uart1", &uart1_clk),
	CLK(NULL, "uart2", &uart2_clk),
	CLK("i2c_davinci.1", NULL, &i2c_clk),
	CLK(NULL, "gpio", &gpio_clk),
	CLK(NULL, "aemif", &aemif_clk),
	CLK("davinci_emac.1", NULL, &emac_clk),
	CLK(NULL, "pwm0", &pwm0_clk),
	CLK(NULL, "pwm1", &pwm1_clk),
	CLK(NULL, "timer0", &timer0_clk),
	CLK(NULL, "timer1", &timer1_clk),
	CLK("watchdog", NULL, &timer2_clk),
	CLK(NULL, "vpif0", &vpif0_clk),
	CLK(NULL, "vpif1", &vpif1_clk),
	CLK(NULL, NULL, NULL),
};

#if defined(CONFIG_TI_DAVINCI_EMAC) || defined(CONFIG_TI_DAVINCI_EMAC_MODULE)
static struct resource dm646x_emac_resources[] = {
	{
		.start	= DM646X_EMAC_BASE,
		.end	= DM646X_EMAC_BASE + 0x47ff,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= IRQ_DM646X_EMACRXTHINT,
		.end	= IRQ_DM646X_EMACRXTHINT,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.start	= IRQ_DM646X_EMACRXINT,
		.end	= IRQ_DM646X_EMACRXINT,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.start	= IRQ_DM646X_EMACTXINT,
		.end	= IRQ_DM646X_EMACTXINT,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.start	= IRQ_DM646X_EMACMISCINT,
		.end	= IRQ_DM646X_EMACMISCINT,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device dm646x_emac_device = {
	.name		= "davinci_emac",
	.id		= 1,
	.num_resources	= ARRAY_SIZE(dm646x_emac_resources),
	.resource	= dm646x_emac_resources,
};

#endif

/*
 * Device specific mux setup
 *
 *	soc	description	mux  mode   mode  mux	 dbg
 *				reg  offset mask  mode
 */
static const struct mux_config dm646x_pins[] = {
MUX_CFG(DM646X, ATAEN,		0,   0,     1,	  1,	 true)

MUX_CFG(DM646X, AUDCK1,		0,   29,    1,	  0,	 false)

MUX_CFG(DM646X, AUDCK0,		0,   28,    1,	  0,	 false)

MUX_CFG(DM646X, CRGMUX,			0,   24,    7,    5,	 true)

MUX_CFG(DM646X, STSOMUX_DISABLE,	0,   22,    3,    0,	 true)

MUX_CFG(DM646X, STSIMUX_DISABLE,	0,   20,    3,    0,	 true)

MUX_CFG(DM646X, PTSOMUX_DISABLE,	0,   18,    3,    0,	 true)

MUX_CFG(DM646X, PTSIMUX_DISABLE,	0,   16,    3,    0,	 true)

MUX_CFG(DM646X, STSOMUX,		0,   22,    3,    2,	 true)

MUX_CFG(DM646X, STSIMUX,		0,   20,    3,    2,	 true)

MUX_CFG(DM646X, PTSOMUX_PARALLEL,	0,   18,    3,    2,	 true)

MUX_CFG(DM646X, PTSIMUX_PARALLEL,	0,   16,    3,    2,	 true)

MUX_CFG(DM646X, PTSOMUX_SERIAL,		0,   18,    3,    3,	 true)

MUX_CFG(DM646X, PTSIMUX_SERIAL,		0,   16,    3,    3,	 true)
};

/*----------------------------------------------------------------------*/

static const s8 dma_chan_dm646x_no_event[] = {
	 0,  1,  2,  3, 13,
	14, 15, 24, 25, 26,
	27, 30, 31, 54, 55,
	56,
	-1
};

static struct edma_soc_info dm646x_edma_info = {
	.n_channel	= 64,
	.n_region	= 6,	/* 0-1, 4-7 */
	.n_slot		= 512,
	.n_tc		= 4,
	.noevent	= dma_chan_dm646x_no_event,
};

static struct resource edma_resources[] = {
	{
		.name	= "edma_cc",
		.start	= 0x01c00000,
		.end	= 0x01c00000 + SZ_64K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc0",
		.start	= 0x01c10000,
		.end	= 0x01c10000 + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc1",
		.start	= 0x01c10400,
		.end	= 0x01c10400 + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc2",
		.start	= 0x01c10800,
		.end	= 0x01c10800 + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc3",
		.start	= 0x01c10c00,
		.end	= 0x01c10c00 + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= IRQ_CCINT0,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.start	= IRQ_CCERRINT,
		.flags	= IORESOURCE_IRQ,
	},
	/* not using TC*_ERR */
};

static struct platform_device dm646x_edma_device = {
	.name			= "edma",
	.id			= -1,
	.dev.platform_data	= &dm646x_edma_info,
	.num_resources		= ARRAY_SIZE(edma_resources),
	.resource		= edma_resources,
};

/*----------------------------------------------------------------------*/

#if defined(CONFIG_TI_DAVINCI_EMAC) || defined(CONFIG_TI_DAVINCI_EMAC_MODULE)

void dm646x_init_emac(struct emac_platform_data *pdata)
{
	pdata->ctrl_reg_offset		= DM646X_EMAC_CNTRL_OFFSET;
	pdata->ctrl_mod_reg_offset	= DM646X_EMAC_CNTRL_MOD_OFFSET;
	pdata->ctrl_ram_offset		= DM646X_EMAC_CNTRL_RAM_OFFSET;
	pdata->mdio_reg_offset		= DM646X_EMAC_MDIO_OFFSET;
	pdata->ctrl_ram_size		= DM646X_EMAC_CNTRL_RAM_SIZE;
	pdata->version			= EMAC_VERSION_2;
	dm646x_emac_device.dev.platform_data = pdata;
	platform_device_register(&dm646x_emac_device);
}
#else

void dm646x_init_emac(struct emac_platform_data *unused) {}

#endif

static struct map_desc dm646x_io_desc[] = {
	{
		.virtual	= IO_VIRT,
		.pfn		= __phys_to_pfn(IO_PHYS),
		.length		= IO_SIZE,
		.type		= MT_DEVICE
	},
};

/* Contents of JTAG ID register used to identify exact cpu type */
static struct davinci_id dm646x_ids[] = {
	{
		.variant	= 0x0,
		.part_no	= 0xb770,
		.manufacturer	= 0x017,
		.cpu_id		= DAVINCI_CPU_ID_DM6467,
		.name		= "dm6467",
	},
};

static struct davinci_soc_info davinci_soc_info_dm646x = {
	.io_desc		= dm646x_io_desc,
	.io_desc_num		= ARRAY_SIZE(dm646x_io_desc),
	.jtag_id_base		= IO_ADDRESS(0x01c40028),
	.ids			= dm646x_ids,
	.ids_num		= ARRAY_SIZE(dm646x_ids),
	.cpu_clks		= dm646x_clks,
};

void __init dm646x_init(void)
{
	davinci_common_init(&davinci_soc_info_dm646x);
	davinci_mux_register(dm646x_pins, ARRAY_SIZE(dm646x_pins));
}

static int __init dm646x_init_devices(void)
{
	if (!cpu_is_davinci_dm646x())
		return 0;

	platform_device_register(&dm646x_edma_device);
	return 0;
}
postcore_initcall(dm646x_init_devices);