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/hardware/arm_timer.h>
  14 #include <asm/hardware/cache-l2x0.h>
  15 #include <asm/hardware/gic.h>
  16 #include <asm/pmu.h>
  17 #include <asm/smp_scu.h>
  18 #include <asm/smp_twd.h>
  19
  20 #include <mach/ct-ca9x4.h>
  21
  22 #include <asm/hardware/timer-sp.h>
  23
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/time.h>
  26
  27 #include "core.h"
  28
  29 #include <mach/motherboard.h>
  30
  31 #include <plat/clcd.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         iotable_init(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), "ct-timer1");
  75         sp804_clockevents_init(MMIO_P2V(CT_CA9X4_TIMER0), IRQ_CT_CA9X4_TIMER0,
  76                 "ct-timer0");
  77 }
  78
  79 static struct sys_timer ct_ca9x4_timer = {
  80         .init   = ct_ca9x4_timer_init,
  81 };
  82 #endif
  83
  84 static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
  85 {
  86         v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE_DB1, 0);
  87         v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE_DB1, 2);
  88 }
  89
  90 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
  91 {
  92         unsigned long framesize = 1024 * 768 * 2;
  93
  94         fb->panel = versatile_clcd_get_panel("XVGA");
  95         if (!fb->panel)
  96                 return -EINVAL;
  97
  98         return versatile_clcd_setup_dma(fb, framesize);
  99 }
 100
 101 static struct clcd_board ct_ca9x4_clcd_data = {
 102         .name           = "CT-CA9X4",
 103         .caps           = CLCD_CAP_5551 | CLCD_CAP_565,
 104         .check          = clcdfb_check,
 105         .decode         = clcdfb_decode,
 106         .enable         = ct_ca9x4_clcd_enable,
 107         .setup          = ct_ca9x4_clcd_setup,
 108         .mmap           = versatile_clcd_mmap_dma,
 109         .remove         = versatile_clcd_remove_dma,
 110 };
 111
 112 static AMBA_DEVICE(clcd, "ct:clcd", CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
 113 static AMBA_DEVICE(dmc, "ct:dmc", CT_CA9X4_DMC, NULL);
 114 static AMBA_DEVICE(smc, "ct:smc", CT_CA9X4_SMC, NULL);
 115 static AMBA_DEVICE(gpio, "ct:gpio", CT_CA9X4_GPIO, NULL);
 116
 117 static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
 118         &clcd_device,
 119         &dmc_device,
 120         &smc_device,
 121         &gpio_device,
 122 };
 123
 124
 125 static long ct_round(struct clk *clk, unsigned long rate)
 126 {
 127         return rate;
 128 }
 129
 130 static int ct_set(struct clk *clk, unsigned long rate)
 131 {
 132         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_DB1 | 1, rate);
 133 }
 134
 135 static const struct clk_ops osc1_clk_ops = {
 136         .round  = ct_round,
 137         .set    = ct_set,
 138 };
 139
 140 static struct clk osc1_clk = {
 141         .ops    = &osc1_clk_ops,
 142         .rate   = 24000000,
 143 };
 144
 145 static struct clk ct_sp804_clk = {
 146         .rate   = 1000000,
 147 };
 148
 149 static struct clk_lookup lookups[] = {
 150         {       /* CLCD */
 151                 .dev_id         = "ct:clcd",
 152                 .clk            = &osc1_clk,
 153         }, {    /* SP804 timers */
 154                 .dev_id         = "sp804",
 155                 .con_id         = "ct-timer0",
 156                 .clk            = &ct_sp804_clk,
 157         }, {    /* SP804 timers */
 158                 .dev_id         = "sp804",
 159                 .con_id         = "ct-timer1",
 160                 .clk            = &ct_sp804_clk,
 161         },
 162 };
 163
 164 static struct resource pmu_resources[] = {
 165         [0] = {
 166                 .start  = IRQ_CT_CA9X4_PMU_CPU0,
 167                 .end    = IRQ_CT_CA9X4_PMU_CPU0,
 168                 .flags  = IORESOURCE_IRQ,
 169         },
 170         [1] = {
 171                 .start  = IRQ_CT_CA9X4_PMU_CPU1,
 172                 .end    = IRQ_CT_CA9X4_PMU_CPU1,
 173                 .flags  = IORESOURCE_IRQ,
 174         },
 175         [2] = {
 176                 .start  = IRQ_CT_CA9X4_PMU_CPU2,
 177                 .end    = IRQ_CT_CA9X4_PMU_CPU2,
 178                 .flags  = IORESOURCE_IRQ,
 179         },
 180         [3] = {
 181                 .start  = IRQ_CT_CA9X4_PMU_CPU3,
 182                 .end    = IRQ_CT_CA9X4_PMU_CPU3,
 183                 .flags  = IORESOURCE_IRQ,
 184         },
 185 };
 186
 187 static struct platform_device pmu_device = {
 188         .name           = "arm-pmu",
 189         .id             = ARM_PMU_DEVICE_CPU,
 190         .num_resources  = ARRAY_SIZE(pmu_resources),
 191         .resource       = pmu_resources,
 192 };
 193
 194 static void __init ct_ca9x4_init_early(void)
 195 {
 196         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 197 }
 198
 199 static void __init ct_ca9x4_init(void)
 200 {
 201         int i;
 202
 203 #ifdef CONFIG_CACHE_L2X0
 204         void __iomem *l2x0_base = MMIO_P2V(CT_CA9X4_L2CC);
 205
 206         /* set RAM latencies to 1 cycle for this core tile. */
 207         writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
 208         writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
 209
 210         l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
 211 #endif
 212
 213         for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
 214                 amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
 215
 216         platform_device_register(&pmu_device);
 217 }
 218
 219 #ifdef CONFIG_SMP
 220 static void ct_ca9x4_init_cpu_map(void)
 221 {
 222         int i, ncores = scu_get_core_count(MMIO_P2V(A9_MPCORE_SCU));
 223
 224         if (ncores > nr_cpu_ids) {
 225                 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
 226                         ncores, nr_cpu_ids);
 227                 ncores = nr_cpu_ids;
 228         }
 229
 230         for (i = 0; i < ncores; ++i)
 231                 set_cpu_possible(i, true);
 232
 233         set_smp_cross_call(gic_raise_softirq);
 234 }
 235
 236 static void ct_ca9x4_smp_enable(unsigned int max_cpus)
 237 {
 238         scu_enable(MMIO_P2V(A9_MPCORE_SCU));
 239 }
 240 #endif
 241
 242 struct ct_desc ct_ca9x4_desc __initdata = {
 243         .id             = V2M_CT_ID_CA9,
 244         .name           = "CA9x4",
 245         .map_io         = ct_ca9x4_map_io,
 246         .init_early     = ct_ca9x4_init_early,
 247         .init_irq       = ct_ca9x4_init_irq,
 248         .init_tile      = ct_ca9x4_init,
 249 #ifdef CONFIG_SMP
 250         .init_cpu_map   = ct_ca9x4_init_cpu_map,
 251         .smp_enable     = ct_ca9x4_smp_enable,
 252 #endif
 253 };