arch/arm/mach-vexpress/ct-ca9x4.c

   1 /*
   2  * Versatile Express Core Tile Cortex A9x4 Support
   3  */
   4 #include <linux/init.h>
   5 #include <linux/gfp.h>
   6 #include <linux/device.h>
   7 #include <linux/dma-mapping.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/amba/bus.h>
  10 #include <linux/amba/clcd.h>
  11 #include <linux/clkdev.h>
  12
  13 #include <asm/pgtable.h>
  14 #include <asm/hardware/arm_timer.h>
  15 #include <asm/hardware/cache-l2x0.h>
  16 #include <asm/hardware/gic.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/pmu.h>
  19 #include <asm/smp_twd.h>
  20
  21 #include <mach/ct-ca9x4.h>
  22
  23 #include <asm/hardware/timer-sp.h>
  24
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27 #include <asm/mach/time.h>
  28
  29 #include "core.h"
  30
  31 #include <mach/motherboard.h>
  32
  33 #define V2M_PA_CS7      0x10000000
  34
  35 static struct map_desc ct_ca9x4_io_desc[] __initdata = {
  36         {
  37                 .virtual        = __MMIO_P2V(CT_CA9X4_MPIC),
  38                 .pfn            = __phys_to_pfn(CT_CA9X4_MPIC),
  39                 .length         = SZ_16K,
  40                 .type           = MT_DEVICE,
  41         }, {
  42                 .virtual        = __MMIO_P2V(CT_CA9X4_SP804_TIMER),
  43                 .pfn            = __phys_to_pfn(CT_CA9X4_SP804_TIMER),
  44                 .length         = SZ_4K,
  45                 .type           = MT_DEVICE,
  46         }, {
  47                 .virtual        = __MMIO_P2V(CT_CA9X4_L2CC),
  48                 .pfn            = __phys_to_pfn(CT_CA9X4_L2CC),
  49                 .length         = SZ_4K,
  50                 .type           = MT_DEVICE,
  51         },
  52 };
  53
  54 static void __init ct_ca9x4_map_io(void)
  55 {
  56 #ifdef CONFIG_LOCAL_TIMERS
  57         twd_base = MMIO_P2V(A9_MPCORE_TWD);
  58 #endif
  59         v2m_map_io(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
  60 }
  61
  62 static void __init ct_ca9x4_init_irq(void)
  63 {
  64         gic_init(0, 29, MMIO_P2V(A9_MPCORE_GIC_DIST),
  65                  MMIO_P2V(A9_MPCORE_GIC_CPU));
  66 }
  67
  68 #if 0
  69 static void __init ct_ca9x4_timer_init(void)
  70 {
  71         writel(0, MMIO_P2V(CT_CA9X4_TIMER0) + TIMER_CTRL);
  72         writel(0, MMIO_P2V(CT_CA9X4_TIMER1) + TIMER_CTRL);
  73
  74         sp804_clocksource_init(MMIO_P2V(CT_CA9X4_TIMER1));
  75         sp804_clockevents_init(MMIO_P2V(CT_CA9X4_TIMER0), IRQ_CT_CA9X4_TIMER0);
  76 }
  77
  78 static struct sys_timer ct_ca9x4_timer = {
  79         .init   = ct_ca9x4_timer_init,
  80 };
  81 #endif
  82
  83 static struct clcd_panel xvga_panel = {
  84         .mode           = {
  85                 .name           = "XVGA",
  86                 .refresh        = 60,
  87                 .xres           = 1024,
  88                 .yres           = 768,
  89                 .pixclock       = 15384,
  90                 .left_margin    = 168,
  91                 .right_margin   = 8,
  92                 .upper_margin   = 29,
  93                 .lower_margin   = 3,
  94                 .hsync_len      = 144,
  95                 .vsync_len      = 6,
  96                 .sync           = 0,
  97                 .vmode          = FB_VMODE_NONINTERLACED,
  98         },
  99         .width          = -1,
 100         .height         = -1,
 101         .tim2           = TIM2_BCD | TIM2_IPC,
 102         .cntl           = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
 103         .bpp            = 16,
 104 };
 105
 106 static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
 107 {
 108         v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE_DB1, 0);
 109         v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE_DB1, 2);
 110 }
 111
 112 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
 113 {
 114         unsigned long framesize = 1024 * 768 * 2;
 115         dma_addr_t dma;
 116
 117         fb->panel = &xvga_panel;
 118
 119         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
 120                                 &dma, GFP_KERNEL);
 121         if (!fb->fb.screen_base) {
 122                 printk(KERN_ERR "CLCD: unable to map frame buffer\n");
 123                 return -ENOMEM;
 124         }
 125         fb->fb.fix.smem_start = dma;
 126         fb->fb.fix.smem_len = framesize;
 127
 128         return 0;
 129 }
 130
 131 static int ct_ca9x4_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 132 {
 133         return dma_mmap_writecombine(&fb->dev->dev, vma, fb->fb.screen_base,
 134                 fb->fb.fix.smem_start, fb->fb.fix.smem_len);
 135 }
 136
 137 static void ct_ca9x4_clcd_remove(struct clcd_fb *fb)
 138 {
 139         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 140                 fb->fb.screen_base, fb->fb.fix.smem_start);
 141 }
 142
 143 static struct clcd_board ct_ca9x4_clcd_data = {
 144         .name           = "CT-CA9X4",
 145         .check          = clcdfb_check,
 146         .decode         = clcdfb_decode,
 147         .enable         = ct_ca9x4_clcd_enable,
 148         .setup          = ct_ca9x4_clcd_setup,
 149         .mmap           = ct_ca9x4_clcd_mmap,
 150         .remove         = ct_ca9x4_clcd_remove,
 151 };
 152
 153 static AMBA_DEVICE(clcd, "ct:clcd", CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
 154 static AMBA_DEVICE(dmc, "ct:dmc", CT_CA9X4_DMC, NULL);
 155 static AMBA_DEVICE(smc, "ct:smc", CT_CA9X4_SMC, NULL);
 156 static AMBA_DEVICE(gpio, "ct:gpio", CT_CA9X4_GPIO, NULL);
 157
 158 static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
 159         &clcd_device,
 160         &dmc_device,
 161         &smc_device,
 162         &gpio_device,
 163 };
 164
 165
 166 static long ct_round(struct clk *clk, unsigned long rate)
 167 {
 168         return rate;
 169 }
 170
 171 static int ct_set(struct clk *clk, unsigned long rate)
 172 {
 173         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_DB1 | 1, rate);
 174 }
 175
 176 static const struct clk_ops osc1_clk_ops = {
 177         .round  = ct_round,
 178         .set    = ct_set,
 179 };
 180
 181 static struct clk osc1_clk = {
 182         .ops    = &osc1_clk_ops,
 183         .rate   = 24000000,
 184 };
 185
 186 static struct clk_lookup lookups[] = {
 187         {       /* CLCD */
 188                 .dev_id         = "ct:clcd",
 189                 .clk            = &osc1_clk,
 190         },
 191 };
 192
 193 static struct resource pmu_resources[] = {
 194         [0] = {
 195                 .start  = IRQ_CT_CA9X4_PMU_CPU0,
 196                 .end    = IRQ_CT_CA9X4_PMU_CPU0,
 197                 .flags  = IORESOURCE_IRQ,
 198         },
 199         [1] = {
 200                 .start  = IRQ_CT_CA9X4_PMU_CPU1,
 201                 .end    = IRQ_CT_CA9X4_PMU_CPU1,
 202                 .flags  = IORESOURCE_IRQ,
 203         },
 204         [2] = {
 205                 .start  = IRQ_CT_CA9X4_PMU_CPU2,
 206                 .end    = IRQ_CT_CA9X4_PMU_CPU2,
 207                 .flags  = IORESOURCE_IRQ,
 208         },
 209         [3] = {
 210                 .start  = IRQ_CT_CA9X4_PMU_CPU3,
 211                 .end    = IRQ_CT_CA9X4_PMU_CPU3,
 212                 .flags  = IORESOURCE_IRQ,
 213         },
 214 };
 215
 216 static struct platform_device pmu_device = {
 217         .name           = "arm-pmu",
 218         .id             = ARM_PMU_DEVICE_CPU,
 219         .num_resources  = ARRAY_SIZE(pmu_resources),
 220         .resource       = pmu_resources,
 221 };
 222
 223 static void __init ct_ca9x4_init(void)
 224 {
 225         int i;
 226
 227 #ifdef CONFIG_CACHE_L2X0
 228         void __iomem *l2x0_base = MMIO_P2V(CT_CA9X4_L2CC);
 229
 230         /* set RAM latencies to 1 cycle for this core tile. */
 231         writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
 232         writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
 233
 234         l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
 235 #endif
 236
 237         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 238
 239         for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
 240                 amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
 241
 242         platform_device_register(&pmu_device);
 243 }
 244
 245 MACHINE_START(VEXPRESS, "ARM-Versatile Express CA9x4")
 246         .boot_params    = PHYS_OFFSET + 0x00000100,
 247         .map_io         = ct_ca9x4_map_io,
 248         .init_irq       = ct_ca9x4_init_irq,
 249 #if 0
 250         .timer          = &ct_ca9x4_timer,
 251 #else
 252         .timer          = &v2m_timer,
 253 #endif
 254         .init_machine   = ct_ca9x4_init,
 255 MACHINE_END