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         u32 site = v2m_get_master_site();
  70
  71         /*
  72          * Old firmware was using the "site" component of the command
  73          * to control the DVI muxer (while it should be always 0 ie. MB).
  74          * Newer firmware uses the data register. Keep both for compatibility.
  75          */
  76         v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE(site), site);
  77         v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE(SYS_CFG_SITE_MB), 2);
  78 }
  79
  80 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
  81 {
  82         unsigned long framesize = 1024 * 768 * 2;
  83
  84         fb->panel = versatile_clcd_get_panel("XVGA");
  85         if (!fb->panel)
  86                 return -EINVAL;
  87
  88         return versatile_clcd_setup_dma(fb, framesize);
  89 }
  90
  91 static struct clcd_board ct_ca9x4_clcd_data = {
  92         .name           = "CT-CA9X4",
  93         .caps           = CLCD_CAP_5551 | CLCD_CAP_565,
  94         .check          = clcdfb_check,
  95         .decode         = clcdfb_decode,
  96         .enable         = ct_ca9x4_clcd_enable,
  97         .setup          = ct_ca9x4_clcd_setup,
  98         .mmap           = versatile_clcd_mmap_dma,
  99         .remove         = versatile_clcd_remove_dma,
 100 };
 101
 102 static AMBA_AHB_DEVICE(clcd, "ct:clcd", 0, CT_CA9X4_CLCDC, IRQ_CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
 103 static AMBA_APB_DEVICE(dmc, "ct:dmc", 0, CT_CA9X4_DMC, IRQ_CT_CA9X4_DMC, NULL);
 104 static AMBA_APB_DEVICE(smc, "ct:smc", 0, CT_CA9X4_SMC, IRQ_CT_CA9X4_SMC, NULL);
 105 static AMBA_APB_DEVICE(gpio, "ct:gpio", 0, CT_CA9X4_GPIO, IRQ_CT_CA9X4_GPIO, NULL);
 106
 107 static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
 108         &clcd_device,
 109         &dmc_device,
 110         &smc_device,
 111         &gpio_device,
 112 };
 113
 114
 115 static struct v2m_osc ct_osc1 = {
 116         .osc = 1,
 117         .rate_min = 10000000,
 118         .rate_max = 80000000,
 119         .rate_default = 23750000,
 120 };
 121
 122 static struct resource pmu_resources[] = {
 123         [0] = {
 124                 .start  = IRQ_CT_CA9X4_PMU_CPU0,
 125                 .end    = IRQ_CT_CA9X4_PMU_CPU0,
 126                 .flags  = IORESOURCE_IRQ,
 127         },
 128         [1] = {
 129                 .start  = IRQ_CT_CA9X4_PMU_CPU1,
 130                 .end    = IRQ_CT_CA9X4_PMU_CPU1,
 131                 .flags  = IORESOURCE_IRQ,
 132         },
 133         [2] = {
 134                 .start  = IRQ_CT_CA9X4_PMU_CPU2,
 135                 .end    = IRQ_CT_CA9X4_PMU_CPU2,
 136                 .flags  = IORESOURCE_IRQ,
 137         },
 138         [3] = {
 139                 .start  = IRQ_CT_CA9X4_PMU_CPU3,
 140                 .end    = IRQ_CT_CA9X4_PMU_CPU3,
 141                 .flags  = IORESOURCE_IRQ,
 142         },
 143 };
 144
 145 static struct platform_device pmu_device = {
 146         .name           = "arm-pmu",
 147         .id             = ARM_PMU_DEVICE_CPU,
 148         .num_resources  = ARRAY_SIZE(pmu_resources),
 149         .resource       = pmu_resources,
 150 };
 151
 152 static void __init ct_ca9x4_init(void)
 153 {
 154         int i;
 155         struct clk *clk;
 156
 157 #ifdef CONFIG_CACHE_L2X0
 158         void __iomem *l2x0_base = ioremap(CT_CA9X4_L2CC, SZ_4K);
 159
 160         /* set RAM latencies to 1 cycle for this core tile. */
 161         writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
 162         writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
 163
 164         l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
 165 #endif
 166
 167         ct_osc1.site = v2m_get_master_site();
 168         clk = v2m_osc_register("ct:osc1", &ct_osc1);
 169         clk_register_clkdev(clk, NULL, "ct:clcd");
 170
 171         for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
 172                 amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
 173
 174         platform_device_register(&pmu_device);
 175 }
 176
 177 #ifdef CONFIG_SMP
 178 static void *ct_ca9x4_scu_base __initdata;
 179
 180 static void __init ct_ca9x4_init_cpu_map(void)
 181 {
 182         int i, ncores;
 183
 184         ct_ca9x4_scu_base = ioremap(A9_MPCORE_SCU, SZ_128);
 185         if (WARN_ON(!ct_ca9x4_scu_base))
 186                 return;
 187
 188         ncores = scu_get_core_count(ct_ca9x4_scu_base);
 189
 190         if (ncores > nr_cpu_ids) {
 191                 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
 192                         ncores, nr_cpu_ids);
 193                 ncores = nr_cpu_ids;
 194         }
 195
 196         for (i = 0; i < ncores; ++i)
 197                 set_cpu_possible(i, true);
 198
 199         set_smp_cross_call(gic_raise_softirq);
 200 }
 201
 202 static void __init ct_ca9x4_smp_enable(unsigned int max_cpus)
 203 {
 204         scu_enable(ct_ca9x4_scu_base);
 205 }
 206 #endif
 207
 208 struct ct_desc ct_ca9x4_desc __initdata = {
 209         .id             = V2M_CT_ID_CA9,
 210         .name           = "CA9x4",
 211         .map_io         = ct_ca9x4_map_io,
 212         .init_irq       = ct_ca9x4_init_irq,
 213         .init_tile      = ct_ca9x4_init,
 214 #ifdef CONFIG_SMP
 215         .init_cpu_map   = ct_ca9x4_init_cpu_map,
 216         .smp_enable     = ct_ca9x4_smp_enable,
 217 #endif
 218 };