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 static struct map_desc ct_ca9x4_io_desc[] __initdata = {
  34         {
  35                 .virtual        = V2T_PERIPH,
  36                 .pfn            = __phys_to_pfn(CT_CA9X4_MPIC),
  37                 .length         = SZ_8K,
  38                 .type           = MT_DEVICE,
  39         },
  40 };
  41
  42 static void __init ct_ca9x4_map_io(void)
  43 {
  44         iotable_init(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
  45 }
  46
  47 #ifdef CONFIG_HAVE_ARM_TWD
  48 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, A9_MPCORE_TWD, IRQ_LOCALTIMER);
  49
  50 static void __init ca9x4_twd_init(void)
  51 {
  52         int err = twd_local_timer_register(&twd_local_timer);
  53         if (err)
  54                 pr_err("twd_local_timer_register failed %d\n", err);
  55 }
  56 #else
  57 #define ca9x4_twd_init()        do {} while(0)
  58 #endif
  59
  60 static void __init ct_ca9x4_init_irq(void)
  61 {
  62         gic_init(0, 29, ioremap(A9_MPCORE_GIC_DIST, SZ_4K),
  63                  ioremap(A9_MPCORE_GIC_CPU, SZ_256));
  64         ca9x4_twd_init();
  65 }
  66
  67 static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
  68 {
  69         v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE_DB1, 0);
  70         v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE_DB1, 2);
  71 }
  72
  73 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
  74 {
  75         unsigned long framesize = 1024 * 768 * 2;
  76
  77         fb->panel = versatile_clcd_get_panel("XVGA");
  78         if (!fb->panel)
  79                 return -EINVAL;
  80
  81         return versatile_clcd_setup_dma(fb, framesize);
  82 }
  83
  84 static struct clcd_board ct_ca9x4_clcd_data = {
  85         .name           = "CT-CA9X4",
  86         .caps           = CLCD_CAP_5551 | CLCD_CAP_565,
  87         .check          = clcdfb_check,
  88         .decode         = clcdfb_decode,
  89         .enable         = ct_ca9x4_clcd_enable,
  90         .setup          = ct_ca9x4_clcd_setup,
  91         .mmap           = versatile_clcd_mmap_dma,
  92         .remove         = versatile_clcd_remove_dma,
  93 };
  94
  95 static AMBA_AHB_DEVICE(clcd, "ct:clcd", 0, CT_CA9X4_CLCDC, IRQ_CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
  96 static AMBA_APB_DEVICE(dmc, "ct:dmc", 0, CT_CA9X4_DMC, IRQ_CT_CA9X4_DMC, NULL);
  97 static AMBA_APB_DEVICE(smc, "ct:smc", 0, CT_CA9X4_SMC, IRQ_CT_CA9X4_SMC, NULL);
  98 static AMBA_APB_DEVICE(gpio, "ct:gpio", 0, CT_CA9X4_GPIO, IRQ_CT_CA9X4_GPIO, NULL);
  99
 100 static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
 101         &clcd_device,
 102         &dmc_device,
 103         &smc_device,
 104         &gpio_device,
 105 };
 106
 107
 108 static long ct_round(struct clk *clk, unsigned long rate)
 109 {
 110         return rate;
 111 }
 112
 113 static int ct_set(struct clk *clk, unsigned long rate)
 114 {
 115         return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_DB1 | 1, rate);
 116 }
 117
 118 static const struct clk_ops osc1_clk_ops = {
 119         .round  = ct_round,
 120         .set    = ct_set,
 121 };
 122
 123 static struct clk osc1_clk = {
 124         .ops    = &osc1_clk_ops,
 125         .rate   = 24000000,
 126 };
 127
 128 static struct clk ct_sp804_clk = {
 129         .rate   = 1000000,
 130 };
 131
 132 static struct clk_lookup lookups[] = {
 133         {       /* CLCD */
 134                 .dev_id         = "ct:clcd",
 135                 .clk            = &osc1_clk,
 136         }, {    /* SP804 timers */
 137                 .dev_id         = "sp804",
 138                 .con_id         = "ct-timer0",
 139                 .clk            = &ct_sp804_clk,
 140         }, {    /* SP804 timers */
 141                 .dev_id         = "sp804",
 142                 .con_id         = "ct-timer1",
 143                 .clk            = &ct_sp804_clk,
 144         },
 145 };
 146
 147 static struct resource pmu_resources[] = {
 148         [0] = {
 149                 .start  = IRQ_CT_CA9X4_PMU_CPU0,
 150                 .end    = IRQ_CT_CA9X4_PMU_CPU0,
 151                 .flags  = IORESOURCE_IRQ,
 152         },
 153         [1] = {
 154                 .start  = IRQ_CT_CA9X4_PMU_CPU1,
 155                 .end    = IRQ_CT_CA9X4_PMU_CPU1,
 156                 .flags  = IORESOURCE_IRQ,
 157         },
 158         [2] = {
 159                 .start  = IRQ_CT_CA9X4_PMU_CPU2,
 160                 .end    = IRQ_CT_CA9X4_PMU_CPU2,
 161                 .flags  = IORESOURCE_IRQ,
 162         },
 163         [3] = {
 164                 .start  = IRQ_CT_CA9X4_PMU_CPU3,
 165                 .end    = IRQ_CT_CA9X4_PMU_CPU3,
 166                 .flags  = IORESOURCE_IRQ,
 167         },
 168 };
 169
 170 static struct platform_device pmu_device = {
 171         .name           = "arm-pmu",
 172         .id             = ARM_PMU_DEVICE_CPU,
 173         .num_resources  = ARRAY_SIZE(pmu_resources),
 174         .resource       = pmu_resources,
 175 };
 176
 177 static void __init ct_ca9x4_init_early(void)
 178 {
 179         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 180 }
 181
 182 static void __init ct_ca9x4_init(void)
 183 {
 184         int i;
 185
 186 #ifdef CONFIG_CACHE_L2X0
 187         void __iomem *l2x0_base = ioremap(CT_CA9X4_L2CC, SZ_4K);
 188
 189         /* set RAM latencies to 1 cycle for this core tile. */
 190         writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
 191         writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
 192
 193         l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
 194 #endif
 195
 196         for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
 197                 amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
 198
 199         platform_device_register(&pmu_device);
 200 }
 201
 202 #ifdef CONFIG_SMP
 203 static void *ct_ca9x4_scu_base __initdata;
 204
 205 static void __init ct_ca9x4_init_cpu_map(void)
 206 {
 207         int i, ncores;
 208
 209         ct_ca9x4_scu_base = ioremap(A9_MPCORE_SCU, SZ_128);
 210         if (WARN_ON(!ct_ca9x4_scu_base))
 211                 return;
 212
 213         ncores = scu_get_core_count(ct_ca9x4_scu_base);
 214
 215         if (ncores > nr_cpu_ids) {
 216                 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
 217                         ncores, nr_cpu_ids);
 218                 ncores = nr_cpu_ids;
 219         }
 220
 221         for (i = 0; i < ncores; ++i)
 222                 set_cpu_possible(i, true);
 223
 224         set_smp_cross_call(gic_raise_softirq);
 225 }
 226
 227 static void __init ct_ca9x4_smp_enable(unsigned int max_cpus)
 228 {
 229         scu_enable(ct_ca9x4_scu_base);
 230 }
 231 #endif
 232
 233 struct ct_desc ct_ca9x4_desc __initdata = {
 234         .id             = V2M_CT_ID_CA9,
 235         .name           = "CA9x4",
 236         .map_io         = ct_ca9x4_map_io,
 237         .init_early     = ct_ca9x4_init_early,
 238         .init_irq       = ct_ca9x4_init_irq,
 239         .init_tile      = ct_ca9x4_init,
 240 #ifdef CONFIG_SMP
 241         .init_cpu_map   = ct_ca9x4_init_cpu_map,
 242         .smp_enable     = ct_ca9x4_smp_enable,
 243 #endif
 244 };