2 * Versatile board support using the device tree
4 * Copyright (C) 2010 Secret Lab Technologies Ltd.
5 * Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
6 * Copyright (C) 2004 ARM Limited
7 * Copyright (C) 2000 Deep Blue Solutions Ltd
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/init.h>
27 #include <linux/of_address.h>
28 #include <linux/of_irq.h>
29 #include <linux/of_platform.h>
30 #include <linux/slab.h>
31 #include <linux/amba/bus.h>
32 #include <linux/amba/clcd.h>
33 #include <linux/platform_data/video-clcd-versatile.h>
34 #include <linux/amba/mmci.h>
35 #include <asm/mach-types.h>
36 #include <asm/mach/arch.h>
37 #include <asm/mach/map.h>
39 /* macro to get at MMIO space when running virtually */
40 #define IO_ADDRESS(x) (((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
41 #define __io_address(n) ((void __iomem __force *)IO_ADDRESS(n))
44 * ------------------------------------------------------------------------
46 * ------------------------------------------------------------------------
48 #define VERSATILE_SYS_PCICTL_OFFSET 0x44
49 #define VERSATILE_SYS_MCI_OFFSET 0x48
50 #define VERSATILE_SYS_CLCD_OFFSET 0x50
53 * VERSATILE peripheral addresses
55 #define VERSATILE_MMCI0_BASE 0x10005000 /* MMC interface */
56 #define VERSATILE_MMCI1_BASE 0x1000B000 /* MMC Interface */
57 #define VERSATILE_CLCD_BASE 0x10120000 /* CLCD */
58 #define VERSATILE_SCTL_BASE 0x101E0000 /* System controller */
59 #define VERSATILE_IB2_BASE 0x24000000 /* IB2 module */
60 #define VERSATILE_IB2_CTL_BASE (VERSATILE_IB2_BASE + 0x03000000)
63 * System controller bit assignment
65 #define VERSATILE_REFCLK 0
66 #define VERSATILE_TIMCLK 1
68 #define VERSATILE_TIMER1_EnSel 15
69 #define VERSATILE_TIMER2_EnSel 17
70 #define VERSATILE_TIMER3_EnSel 19
71 #define VERSATILE_TIMER4_EnSel 21
73 static void __iomem *versatile_sys_base;
74 static void __iomem *versatile_ib2_ctrl;
76 unsigned int mmc_status(struct device *dev)
78 struct amba_device *adev = container_of(dev, struct amba_device, dev);
81 if (adev->res.start == VERSATILE_MMCI0_BASE)
86 return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
89 static struct mmci_platform_data mmc0_plat_data = {
90 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
94 static struct mmci_platform_data mmc1_plat_data = {
95 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
102 #define SYS_CLCD_MODE_MASK (3 << 0)
103 #define SYS_CLCD_MODE_888 (0 << 0)
104 #define SYS_CLCD_MODE_5551 (1 << 0)
105 #define SYS_CLCD_MODE_565_RLSB (2 << 0)
106 #define SYS_CLCD_MODE_565_BLSB (3 << 0)
107 #define SYS_CLCD_NLCDIOON (1 << 2)
108 #define SYS_CLCD_VDDPOSSWITCH (1 << 3)
109 #define SYS_CLCD_PWR3V5SWITCH (1 << 4)
110 #define SYS_CLCD_ID_MASK (0x1f << 8)
111 #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
112 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
113 #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
114 #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
115 #define SYS_CLCD_ID_VGA (0x1f << 8)
117 static bool is_sanyo_2_5_lcd;
120 * Disable all display connectors on the interface module.
122 static void versatile_clcd_disable(struct clcd_fb *fb)
124 void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
127 val = readl(sys_clcd);
128 val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
129 writel(val, sys_clcd);
132 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
134 if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
137 ctrl = readl(versatile_ib2_ctrl);
139 writel(ctrl, versatile_ib2_ctrl);
144 * Enable the relevant connector on the interface module.
146 static void versatile_clcd_enable(struct clcd_fb *fb)
148 struct fb_var_screeninfo *var = &fb->fb.var;
149 void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
152 val = readl(sys_clcd);
153 val &= ~SYS_CLCD_MODE_MASK;
155 switch (var->green.length) {
157 val |= SYS_CLCD_MODE_5551;
160 if (var->red.offset == 0)
161 val |= SYS_CLCD_MODE_565_RLSB;
163 val |= SYS_CLCD_MODE_565_BLSB;
166 val |= SYS_CLCD_MODE_888;
173 writel(val, sys_clcd);
176 * And now enable the PSUs
178 val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
179 writel(val, sys_clcd);
182 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
184 if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
187 ctrl = readl(versatile_ib2_ctrl);
189 writel(ctrl, versatile_ib2_ctrl);
194 * Detect which LCD panel is connected, and return the appropriate
195 * clcd_panel structure. Note: we do not have any information on
196 * the required timings for the 8.4in panel, so we presently assume
199 static int versatile_clcd_setup(struct clcd_fb *fb)
201 void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
202 const char *panel_name;
205 is_sanyo_2_5_lcd = false;
207 val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
208 if (val == SYS_CLCD_ID_SANYO_3_8)
209 panel_name = "Sanyo TM38QV67A02A";
210 else if (val == SYS_CLCD_ID_SANYO_2_5) {
211 panel_name = "Sanyo QVGA Portrait";
212 is_sanyo_2_5_lcd = true;
213 } else if (val == SYS_CLCD_ID_EPSON_2_2)
214 panel_name = "Epson L2F50113T00";
215 else if (val == SYS_CLCD_ID_VGA)
218 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
223 fb->panel = versatile_clcd_get_panel(panel_name);
227 return versatile_clcd_setup_dma(fb, SZ_1M);
230 static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
232 clcdfb_decode(fb, regs);
234 /* Always clear BGR for RGB565: we do the routing externally */
235 if (fb->fb.var.green.length == 6)
236 regs->cntl &= ~CNTL_BGR;
239 static struct clcd_board clcd_plat_data = {
241 .caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
242 .check = clcdfb_check,
243 .decode = versatile_clcd_decode,
244 .disable = versatile_clcd_disable,
245 .enable = versatile_clcd_enable,
246 .setup = versatile_clcd_setup,
247 .mmap = versatile_clcd_mmap_dma,
248 .remove = versatile_clcd_remove_dma,
252 * Lookup table for attaching a specific name and platform_data pointer to
253 * devices as they get created by of_platform_populate(). Ideally this table
254 * would not exist, but the current clock implementation depends on some devices
255 * having a specific name.
257 struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
258 OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data),
259 OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data),
260 OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_plat_data),
264 static struct map_desc versatile_io_desc[] __initdata __maybe_unused = {
266 .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE),
267 .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
273 static void __init versatile_map_io(void)
276 iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
279 static void __init versatile_init_early(void)
284 * set clock frequency:
285 * VERSATILE_REFCLK is 32KHz
286 * VERSATILE_TIMCLK is 1MHz
288 val = readl(__io_address(VERSATILE_SCTL_BASE));
289 writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
290 (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
291 (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
292 (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
293 __io_address(VERSATILE_SCTL_BASE));
296 static void __init versatile_dt_pci_init(void)
299 struct device_node *np;
300 struct property *newprop;
302 np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
306 /* Check if PCI backplane is detected */
307 val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
310 * Enable PCI accesses. Note that the documentaton is
311 * inconsistent whether or not this is needed, but the old
312 * driver had it so we will keep it.
314 writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
318 newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
322 newprop->name = kstrdup("status", GFP_KERNEL);
323 newprop->value = kstrdup("disabled", GFP_KERNEL);
324 newprop->length = sizeof("disabled");
325 of_update_property(np, newprop);
327 pr_info("Not plugged into PCI backplane!\n");
330 static void __init versatile_dt_init(void)
332 struct device_node *np;
334 np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
336 versatile_sys_base = of_iomap(np, 0);
337 WARN_ON(!versatile_sys_base);
339 versatile_ib2_ctrl = ioremap(VERSATILE_IB2_CTL_BASE, SZ_4K);
341 versatile_dt_pci_init();
343 of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL);
346 static const char *const versatile_dt_match[] __initconst = {
352 DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
353 .map_io = versatile_map_io,
354 .init_early = versatile_init_early,
355 .init_machine = versatile_dt_init,
356 .dt_compat = versatile_dt_match,