2 * Versatile Express Core Tile Cortex A9x4 Support
4 #include <linux/init.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 #include <linux/vexpress.h>
13 #include <linux/irqchip/arm-gic.h>
15 #include <asm/hardware/arm_timer.h>
16 #include <asm/hardware/cache-l2x0.h>
17 #include <asm/smp_scu.h>
18 #include <asm/smp_twd.h>
20 #include <mach/ct-ca9x4.h>
22 #include <asm/hardware/timer-sp.h>
24 #include <asm/mach/map.h>
25 #include <asm/mach/time.h>
29 #include <mach/motherboard.h>
30 #include <mach/irqs.h>
32 #include <plat/clcd.h>
34 static struct map_desc ct_ca9x4_io_desc[] __initdata = {
36 .virtual = V2T_PERIPH,
37 .pfn = __phys_to_pfn(CT_CA9X4_MPIC),
43 static void __init ct_ca9x4_map_io(void)
45 iotable_init(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
48 #ifdef CONFIG_HAVE_ARM_TWD
49 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, A9_MPCORE_TWD, IRQ_LOCALTIMER);
51 static void __init ca9x4_twd_init(void)
53 int err = twd_local_timer_register(&twd_local_timer);
55 pr_err("twd_local_timer_register failed %d\n", err);
58 #define ca9x4_twd_init() do {} while(0)
61 static void __init ct_ca9x4_init_irq(void)
63 gic_init(0, 29, ioremap(A9_MPCORE_GIC_DIST, SZ_4K),
64 ioremap(A9_MPCORE_GIC_CPU, SZ_256));
68 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
70 unsigned long framesize = 1024 * 768 * 2;
72 fb->panel = versatile_clcd_get_panel("XVGA");
76 return versatile_clcd_setup_dma(fb, framesize);
79 static struct clcd_board ct_ca9x4_clcd_data = {
81 .caps = CLCD_CAP_5551 | CLCD_CAP_565,
82 .check = clcdfb_check,
83 .decode = clcdfb_decode,
84 .setup = ct_ca9x4_clcd_setup,
85 .mmap = versatile_clcd_mmap_dma,
86 .remove = versatile_clcd_remove_dma,
89 static AMBA_AHB_DEVICE(clcd, "ct:clcd", 0, CT_CA9X4_CLCDC, IRQ_CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
90 static AMBA_APB_DEVICE(dmc, "ct:dmc", 0, CT_CA9X4_DMC, IRQ_CT_CA9X4_DMC, NULL);
91 static AMBA_APB_DEVICE(smc, "ct:smc", 0, CT_CA9X4_SMC, IRQ_CT_CA9X4_SMC, NULL);
92 static AMBA_APB_DEVICE(gpio, "ct:gpio", 0, CT_CA9X4_GPIO, IRQ_CT_CA9X4_GPIO, NULL);
94 static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
101 static struct resource pmu_resources[] = {
103 .start = IRQ_CT_CA9X4_PMU_CPU0,
104 .end = IRQ_CT_CA9X4_PMU_CPU0,
105 .flags = IORESOURCE_IRQ,
108 .start = IRQ_CT_CA9X4_PMU_CPU1,
109 .end = IRQ_CT_CA9X4_PMU_CPU1,
110 .flags = IORESOURCE_IRQ,
113 .start = IRQ_CT_CA9X4_PMU_CPU2,
114 .end = IRQ_CT_CA9X4_PMU_CPU2,
115 .flags = IORESOURCE_IRQ,
118 .start = IRQ_CT_CA9X4_PMU_CPU3,
119 .end = IRQ_CT_CA9X4_PMU_CPU3,
120 .flags = IORESOURCE_IRQ,
124 static struct platform_device pmu_device = {
127 .num_resources = ARRAY_SIZE(pmu_resources),
128 .resource = pmu_resources,
131 static struct platform_device osc1_device = {
132 .name = "vexpress-osc",
135 .resource = (struct resource []) {
136 VEXPRESS_RES_FUNC(0xf, 1),
140 static void __init ct_ca9x4_init(void)
144 #ifdef CONFIG_CACHE_L2X0
145 void __iomem *l2x0_base = ioremap(CT_CA9X4_L2CC, SZ_4K);
147 /* set RAM latencies to 1 cycle for this core tile. */
148 writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
149 writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
151 l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
154 for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
155 amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
157 platform_device_register(&pmu_device);
158 platform_device_register(&osc1_device);
160 WARN_ON(clk_register_clkdev(vexpress_osc_setup(&osc1_device.dev),
165 static void *ct_ca9x4_scu_base __initdata;
167 static void __init ct_ca9x4_init_cpu_map(void)
171 ct_ca9x4_scu_base = ioremap(A9_MPCORE_SCU, SZ_128);
172 if (WARN_ON(!ct_ca9x4_scu_base))
175 ncores = scu_get_core_count(ct_ca9x4_scu_base);
177 if (ncores > nr_cpu_ids) {
178 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
183 for (i = 0; i < ncores; ++i)
184 set_cpu_possible(i, true);
187 static void __init ct_ca9x4_smp_enable(unsigned int max_cpus)
189 scu_enable(ct_ca9x4_scu_base);
193 struct ct_desc ct_ca9x4_desc __initdata = {
196 .map_io = ct_ca9x4_map_io,
197 .init_irq = ct_ca9x4_init_irq,
198 .init_tile = ct_ca9x4_init,
200 .init_cpu_map = ct_ca9x4_init_cpu_map,
201 .smp_enable = ct_ca9x4_smp_enable,