2 * linux/arch/arm/mach-integrator/integrator_cp.c
4 * Copyright (C) 2003 Deep Blue Solutions Ltd
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/list.h>
14 #include <linux/platform_device.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/string.h>
17 #include <linux/device.h>
18 #include <linux/amba/bus.h>
19 #include <linux/amba/kmi.h>
20 #include <linux/amba/clcd.h>
21 #include <linux/amba/mmci.h>
23 #include <linux/irqchip/versatile-fpga.h>
24 #include <linux/gfp.h>
25 #include <linux/mtd/physmap.h>
26 #include <linux/platform_data/clk-integrator.h>
27 #include <linux/of_irq.h>
28 #include <linux/of_address.h>
29 #include <linux/of_platform.h>
30 #include <linux/sys_soc.h>
32 #include <mach/hardware.h>
33 #include <mach/platform.h>
34 #include <asm/setup.h>
35 #include <asm/mach-types.h>
36 #include <asm/hardware/arm_timer.h>
37 #include <asm/hardware/icst.h>
41 #include <asm/mach/arch.h>
42 #include <asm/mach/irq.h>
43 #include <asm/mach/map.h>
44 #include <asm/mach/time.h>
46 #include <asm/hardware/timer-sp.h>
48 #include <plat/clcd.h>
49 #include <plat/sched_clock.h>
54 /* Base address to the CP controller */
55 static void __iomem *intcp_con_base;
57 #define INTCP_PA_FLASH_BASE 0x24000000
59 #define INTCP_PA_CLCD_BASE 0xc0000000
61 #define INTCP_FLASHPROG 0x04
62 #define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0)
63 #define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1)
67 * f1300000 13000000 Counter/Timer
68 * f1400000 14000000 Interrupt controller
69 * f1600000 16000000 UART 0
70 * f1700000 17000000 UART 1
71 * f1a00000 1a000000 Debug LEDs
72 * fc900000 c9000000 GPIO
73 * fca00000 ca000000 SIC
76 static struct map_desc intcp_io_desc[] __initdata __maybe_unused = {
78 .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
79 .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
83 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
84 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
88 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
89 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
93 .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
94 .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
98 .virtual = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
99 .pfn = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
103 .virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
104 .pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
110 static void __init intcp_map_io(void)
112 iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
118 static int intcp_flash_init(struct platform_device *dev)
122 val = readl(intcp_con_base + INTCP_FLASHPROG);
123 val |= CINTEGRATOR_FLASHPROG_FLWREN;
124 writel(val, intcp_con_base + INTCP_FLASHPROG);
129 static void intcp_flash_exit(struct platform_device *dev)
133 val = readl(intcp_con_base + INTCP_FLASHPROG);
134 val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
135 writel(val, intcp_con_base + INTCP_FLASHPROG);
138 static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
142 val = readl(intcp_con_base + INTCP_FLASHPROG);
144 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
146 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
147 writel(val, intcp_con_base + INTCP_FLASHPROG);
150 static struct physmap_flash_data intcp_flash_data = {
152 .init = intcp_flash_init,
153 .exit = intcp_flash_exit,
154 .set_vpp = intcp_flash_set_vpp,
158 * It seems that the card insertion interrupt remains active after
159 * we've acknowledged it. We therefore ignore the interrupt, and
160 * rely on reading it from the SIC. This also means that we must
161 * clear the latched interrupt.
163 static unsigned int mmc_status(struct device *dev)
165 unsigned int status = readl(__io_address(0xca000000 + 4));
166 writel(8, intcp_con_base + 8);
171 static struct mmci_platform_data mmc_data = {
172 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
173 .status = mmc_status,
182 * Ensure VGA is selected.
184 static void cp_clcd_enable(struct clcd_fb *fb)
186 struct fb_var_screeninfo *var = &fb->fb.var;
187 u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2
188 | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1;
190 if (var->bits_per_pixel <= 8 ||
191 (var->bits_per_pixel == 16 && var->green.length == 5))
192 /* Pseudocolor, RGB555, BGR555 */
193 val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
194 else if (fb->fb.var.bits_per_pixel <= 16)
195 /* truecolor RGB565 */
196 val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
198 val = 0; /* no idea for this, don't trust the docs */
200 cm_control(CM_CTRL_LCDMUXSEL_MASK|
206 CM_CTRL_n24BITEN, val);
209 static int cp_clcd_setup(struct clcd_fb *fb)
211 fb->panel = versatile_clcd_get_panel("VGA");
215 return versatile_clcd_setup_dma(fb, SZ_1M);
218 static struct clcd_board clcd_data = {
219 .name = "Integrator/CP",
220 .caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
221 .check = clcdfb_check,
222 .decode = clcdfb_decode,
223 .enable = cp_clcd_enable,
224 .setup = cp_clcd_setup,
225 .mmap = versatile_clcd_mmap_dma,
226 .remove = versatile_clcd_remove_dma,
229 #define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
231 static void __init intcp_init_early(void)
233 #ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
234 versatile_sched_clock_init(REFCOUNTER, 24000000);
238 static const struct of_device_id fpga_irq_of_match[] __initconst = {
239 { .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
243 static void __init intcp_init_irq_of(void)
246 of_irq_init(fpga_irq_of_match);
247 integrator_clk_init(true);
251 * For the Device Tree, add in the UART, MMC and CLCD specifics as AUXDATA
252 * and enforce the bus names since these are used for clock lookups.
254 static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
255 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
257 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
259 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
261 OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
263 OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
265 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_MMC_BASE,
267 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_CP_AACI_BASE,
269 OF_DEV_AUXDATA("arm,primecell", INTCP_PA_CLCD_BASE,
271 OF_DEV_AUXDATA("cfi-flash", INTCP_PA_FLASH_BASE,
272 "physmap-flash", &intcp_flash_data),
276 static const struct of_device_id intcp_syscon_match[] = {
277 { .compatible = "arm,integrator-cp-syscon"},
281 static void __init intcp_init_of(void)
283 struct device_node *root;
284 struct device_node *cpcon;
285 struct device *parent;
286 struct soc_device *soc_dev;
287 struct soc_device_attribute *soc_dev_attr;
291 /* Here we create an SoC device for the root node */
292 root = of_find_node_by_path("/");
296 cpcon = of_find_matching_node(root, intcp_syscon_match);
300 intcp_con_base = of_iomap(cpcon, 0);
304 intcp_sc_id = readl(intcp_con_base);
306 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
310 err = of_property_read_string(root, "compatible",
311 &soc_dev_attr->soc_id);
314 err = of_property_read_string(root, "model", &soc_dev_attr->machine);
317 soc_dev_attr->family = "Integrator";
318 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
319 'A' + (intcp_sc_id & 0x0f));
321 soc_dev = soc_device_register(soc_dev_attr);
322 if (IS_ERR(soc_dev)) {
323 kfree(soc_dev_attr->revision);
328 parent = soc_device_to_device(soc_dev);
329 integrator_init_sysfs(parent, intcp_sc_id);
330 of_platform_populate(root, of_default_bus_match_table,
331 intcp_auxdata_lookup, parent);
334 static const char * intcp_dt_board_compat[] = {
339 DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)")
340 .reserve = integrator_reserve,
341 .map_io = intcp_map_io,
342 .init_early = intcp_init_early,
343 .init_irq = intcp_init_irq_of,
344 .handle_irq = fpga_handle_irq,
345 .init_machine = intcp_init_of,
346 .restart = integrator_restart,
347 .dt_compat = intcp_dt_board_compat,