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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/serial_8250.h>
#include <linux/platform_device.h>
#include <linux/gpio.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/time.h>
#include <mach/serial.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),
};

static struct emac_platform_data dm646x_emac_pdata = {
      .ctrl_reg_offset  = DM646X_EMAC_CNTRL_OFFSET,
      .ctrl_mod_reg_offset    = DM646X_EMAC_CNTRL_MOD_OFFSET,
      .ctrl_ram_offset  = DM646X_EMAC_CNTRL_RAM_OFFSET,
      .mdio_reg_offset  = DM646X_EMAC_MDIO_OFFSET,
      .ctrl_ram_size          = DM646X_EMAC_CNTRL_RAM_SIZE,
      .version          = EMAC_VERSION_2,
};

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,
      .dev = {
            .platform_data    = &dm646x_emac_pdata,
      },
      .num_resources    = ARRAY_SIZE(dm646x_emac_resources),
      .resource   = dm646x_emac_resources,
};

#define PINMUX0         0x00
#define PINMUX1         0x04

/*
 * Device specific mux setup
 *
 *    soc   description mux  mode   mode  mux    dbg
 *                      reg  offset mask  mode
 */
static const struct mux_config dm646x_pins[] = {
#ifdef CONFIG_DAVINCI_MUX
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)
#endif
};

static u8 dm646x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
      [IRQ_DM646X_VP_VERTINT0]        = 7,
      [IRQ_DM646X_VP_VERTINT1]        = 7,
      [IRQ_DM646X_VP_VERTINT2]        = 7,
      [IRQ_DM646X_VP_VERTINT3]        = 7,
      [IRQ_DM646X_VP_ERRINT]          = 7,
      [IRQ_DM646X_RESERVED_1]         = 7,
      [IRQ_DM646X_RESERVED_2]         = 7,
      [IRQ_DM646X_WDINT]              = 7,
      [IRQ_DM646X_CRGENINT0]          = 7,
      [IRQ_DM646X_CRGENINT1]          = 7,
      [IRQ_DM646X_TSIFINT0]           = 7,
      [IRQ_DM646X_TSIFINT1]           = 7,
      [IRQ_DM646X_VDCEINT]            = 7,
      [IRQ_DM646X_USBINT]             = 7,
      [IRQ_DM646X_USBDMAINT]          = 7,
      [IRQ_DM646X_PCIINT]             = 7,
      [IRQ_CCINT0]                    = 7,    /* dma */
      [IRQ_CCERRINT]                  = 7,    /* dma */
      [IRQ_TCERRINT0]                 = 7,    /* dma */
      [IRQ_TCERRINT]                  = 7,    /* dma */
      [IRQ_DM646X_TCERRINT2]          = 7,
      [IRQ_DM646X_TCERRINT3]          = 7,
      [IRQ_DM646X_IDE]                = 7,
      [IRQ_DM646X_HPIINT]             = 7,
      [IRQ_DM646X_EMACRXTHINT]        = 7,
      [IRQ_DM646X_EMACRXINT]          = 7,
      [IRQ_DM646X_EMACTXINT]          = 7,
      [IRQ_DM646X_EMACMISCINT]        = 7,
      [IRQ_DM646X_MCASP0TXINT]        = 7,
      [IRQ_DM646X_MCASP0RXINT]        = 7,
      [IRQ_AEMIFINT]                  = 7,
      [IRQ_DM646X_RESERVED_3]         = 7,
      [IRQ_DM646X_MCASP1TXINT]        = 7,    /* clockevent */
      [IRQ_TINT0_TINT34]              = 7,    /* clocksource */
      [IRQ_TINT1_TINT12]              = 7,    /* DSP timer */
      [IRQ_TINT1_TINT34]              = 7,    /* system tick */
      [IRQ_PWMINT0]                   = 7,
      [IRQ_PWMINT1]                   = 7,
      [IRQ_DM646X_VLQINT]             = 7,
      [IRQ_I2C]                       = 7,
      [IRQ_UARTINT0]                  = 7,
      [IRQ_UARTINT1]                  = 7,
      [IRQ_DM646X_UARTINT2]           = 7,
      [IRQ_DM646X_SPINT0]             = 7,
      [IRQ_DM646X_SPINT1]             = 7,
      [IRQ_DM646X_DSP2ARMINT]         = 7,
      [IRQ_DM646X_RESERVED_4]         = 7,
      [IRQ_DM646X_PSCINT]             = 7,
      [IRQ_DM646X_GPIO0]              = 7,
      [IRQ_DM646X_GPIO1]              = 7,
      [IRQ_DM646X_GPIO2]              = 7,
      [IRQ_DM646X_GPIO3]              = 7,
      [IRQ_DM646X_GPIO4]              = 7,
      [IRQ_DM646X_GPIO5]              = 7,
      [IRQ_DM646X_GPIO6]              = 7,
      [IRQ_DM646X_GPIO7]              = 7,
      [IRQ_DM646X_GPIOBNK0]           = 7,
      [IRQ_DM646X_GPIOBNK1]           = 7,
      [IRQ_DM646X_GPIOBNK2]           = 7,
      [IRQ_DM646X_DDRINT]             = 7,
      [IRQ_DM646X_AEMIFINT]           = 7,
      [IRQ_COMMTX]                    = 7,
      [IRQ_COMMRX]                    = 7,
      [IRQ_EMUINT]                    = 7,
};

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

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,
};

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

static struct map_desc dm646x_io_desc[] = {
      {
            .virtual    = IO_VIRT,
            .pfn        = __phys_to_pfn(IO_PHYS),
            .length           = IO_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = SRAM_VIRT,
            .pfn        = __phys_to_pfn(0x00010000),
            .length           = SZ_32K,
            /* MT_MEMORY_NONCACHED requires supersection alignment */
            .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 void __iomem *dm646x_psc_bases[] = {
      IO_ADDRESS(DAVINCI_PWR_SLEEP_CNTRL_BASE),
};

/*
 * T0_BOT: Timer 0, bottom:  clockevent source for hrtimers
 * T0_TOP: Timer 0, top   :  clocksource for generic timekeeping
 * T1_BOT: Timer 1, bottom:  (used by DSP in TI DSPLink code)
 * T1_TOP: Timer 1, top   :  <unused>
 */
struct davinci_timer_info dm646x_timer_info = {
      .timers           = davinci_timer_instance,
      .clockevent_id    = T0_BOT,
      .clocksource_id   = T0_TOP,
};

static struct plat_serial8250_port dm646x_serial_platform_data[] = {
      {
            .mapbase    = DAVINCI_UART0_BASE,
            .irq        = IRQ_UARTINT0,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
                          UPF_IOREMAP,
            .iotype           = UPIO_MEM32,
            .regshift   = 2,
      },
      {
            .mapbase    = DAVINCI_UART1_BASE,
            .irq        = IRQ_UARTINT1,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
                          UPF_IOREMAP,
            .iotype           = UPIO_MEM32,
            .regshift   = 2,
      },
      {
            .mapbase    = DAVINCI_UART2_BASE,
            .irq        = IRQ_DM646X_UARTINT2,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
                          UPF_IOREMAP,
            .iotype           = UPIO_MEM32,
            .regshift   = 2,
      },
      {
            .flags            = 0
      },
};

static struct platform_device dm646x_serial_device = {
      .name             = "serial8250",
      .id               = PLAT8250_DEV_PLATFORM,
      .dev              = {
            .platform_data    = dm646x_serial_platform_data,
      },
};

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,
      .psc_bases        = dm646x_psc_bases,
      .psc_bases_num          = ARRAY_SIZE(dm646x_psc_bases),
      .pinmux_base            = IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE),
      .pinmux_pins            = dm646x_pins,
      .pinmux_pins_num  = ARRAY_SIZE(dm646x_pins),
      .intc_base        = IO_ADDRESS(DAVINCI_ARM_INTC_BASE),
      .intc_type        = DAVINCI_INTC_TYPE_AINTC,
      .intc_irq_prios         = dm646x_default_priorities,
      .intc_irq_num           = DAVINCI_N_AINTC_IRQ,
      .timer_info       = &dm646x_timer_info,
      .wdt_base         = IO_ADDRESS(DAVINCI_WDOG_BASE),
      .gpio_base        = IO_ADDRESS(DAVINCI_GPIO_BASE),
      .gpio_num         = 43, /* Only 33 usable */
      .gpio_irq         = IRQ_DM646X_GPIOBNK0,
      .serial_dev       = &dm646x_serial_device,
      .emac_pdata       = &dm646x_emac_pdata,
      .sram_dma         = 0x10010000,
      .sram_len         = SZ_32K,
};

void __init dm646x_init(void)
{
      davinci_common_init(&davinci_soc_info_dm646x);
}

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

      platform_device_register(&dm646x_edma_device);
      platform_device_register(&dm646x_emac_device);
      return 0;
}
postcore_initcall(dm646x_init_devices);

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