2 * linux/arch/arm/mach-sa1100/assabet.c
4 * Author: Nicolas Pitre
6 * This file contains all Assabet-specific tweaks.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 #include <linux/config.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/ioport.h>
18 #include <linux/serial_core.h>
19 #include <linux/mtd/mtd.h>
20 #include <linux/mtd/partitions.h>
21 #include <linux/delay.h>
24 #include <asm/hardware.h>
25 #include <asm/mach-types.h>
27 #include <asm/setup.h>
29 #include <asm/pgtable.h>
30 #include <asm/tlbflush.h>
32 #include <asm/mach/arch.h>
33 #include <asm/mach/flash.h>
34 #include <asm/mach/irda.h>
35 #include <asm/mach/map.h>
36 #include <asm/mach/serial_sa1100.h>
37 #include <asm/arch/assabet.h>
38 #include <asm/arch/mcp.h>
42 #define ASSABET_BCR_DB1110 \
43 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
44 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
45 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
48 #define ASSABET_BCR_DB1111 \
49 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
50 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
51 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
52 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
53 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
55 unsigned long SCR_value = ASSABET_SCR_INIT;
56 EXPORT_SYMBOL(SCR_value);
58 static unsigned long BCR_value = ASSABET_BCR_DB1110;
60 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
64 local_irq_save(flags);
65 BCR_value = (BCR_value & ~mask) | val;
66 ASSABET_BCR = BCR_value;
67 local_irq_restore(flags);
70 EXPORT_SYMBOL(ASSABET_BCR_frob);
72 static void assabet_backlight_power(int on)
74 #ifndef ASSABET_PAL_VIDEO
76 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
79 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
83 * Turn on/off the backlight. When turning the backlight on,
84 * we wait 500us after turning it on so we don't cause the
85 * supplies to droop when we enable the LCD controller (and
86 * cause a hard reset.)
88 static void assabet_lcd_power(int on)
90 #ifndef ASSABET_PAL_VIDEO
92 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
96 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
101 * Assabet flash support code.
106 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
108 static struct mtd_partition assabet_partitions[] = {
110 .name = "bootloader",
113 .mask_flags = MTD_WRITEABLE,
115 .name = "bootloader params",
117 .offset = MTDPART_OFS_APPEND,
118 .mask_flags = MTD_WRITEABLE,
121 .size = MTDPART_SIZ_FULL,
122 .offset = MTDPART_OFS_APPEND,
127 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
129 static struct mtd_partition assabet_partitions[] = {
131 .name = "bootloader",
134 .mask_flags = MTD_WRITEABLE,
136 .name = "bootloader params",
138 .offset = MTDPART_OFS_APPEND,
139 .mask_flags = MTD_WRITEABLE,
142 .size = MTDPART_SIZ_FULL,
143 .offset = MTDPART_OFS_APPEND,
148 static struct flash_platform_data assabet_flash_data = {
149 .map_name = "cfi_probe",
150 .parts = assabet_partitions,
151 .nr_parts = ARRAY_SIZE(assabet_partitions),
154 static struct resource assabet_flash_resources[] = {
156 .start = SA1100_CS0_PHYS,
157 .end = SA1100_CS0_PHYS + SZ_32M - 1,
158 .flags = IORESOURCE_MEM,
160 .start = SA1100_CS1_PHYS,
161 .end = SA1100_CS1_PHYS + SZ_32M - 1,
162 .flags = IORESOURCE_MEM,
168 * Assabet IrDA support code.
171 static int assabet_irda_set_power(struct device *dev, unsigned int state)
173 static unsigned int bcr_state[4] = {
174 ASSABET_BCR_IRDA_MD0,
175 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
176 ASSABET_BCR_IRDA_MD1,
181 state = bcr_state[state];
182 ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
183 ASSABET_BCR_IRDA_MD0));
184 ASSABET_BCR_set(state);
189 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
192 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
194 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
197 static struct irda_platform_data assabet_irda_data = {
198 .set_power = assabet_irda_set_power,
199 .set_speed = assabet_irda_set_speed,
202 static struct mcp_plat_data assabet_mcp_data = {
204 .sclk_rate = 11981000,
207 static void __init assabet_init(void)
210 * Ensure that the power supply is in "high power" mode.
216 * Ensure that these pins are set as outputs and are driving
217 * logic 0. This ensures that we won't inadvertently toggle
218 * the WS latch in the CPLD, and we don't float causing
219 * excessive power drain. --rmk
221 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
222 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
225 * Set up registers for sleep mode.
231 PPDR |= PPC_TXD3 | PPC_TXD1;
232 PPSR |= PPC_TXD3 | PPC_TXD1;
234 sa1100fb_lcd_power = assabet_lcd_power;
235 sa1100fb_backlight_power = assabet_backlight_power;
237 if (machine_has_neponset()) {
239 * Angel sets this, but other bootloaders may not.
241 * This must precede any driver calls to BCR_set()
244 ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
246 #ifndef CONFIG_ASSABET_NEPONSET
247 printk( "Warning: Neponset detected but full support "
248 "hasn't been configured in the kernel\n" );
252 sa11x0_set_flash_data(&assabet_flash_data, assabet_flash_resources,
253 ARRAY_SIZE(assabet_flash_resources));
254 sa11x0_set_irda_data(&assabet_irda_data);
255 sa11x0_set_mcp_data(&assabet_mcp_data);
259 * On Assabet, we must probe for the Neponset board _before_
260 * paging_init() has occurred to actually determine the amount
261 * of RAM available. To do so, we map the appropriate IO section
262 * in the page table here in order to access GPIO registers.
264 static void __init map_sa1100_gpio_regs( void )
266 unsigned long phys = __PREG(GPLR) & PMD_MASK;
267 unsigned long virt = io_p2v(phys);
268 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
271 pmd = pmd_offset(pgd_offset_k(virt), virt);
272 *pmd = __pmd(phys | prot);
273 flush_pmd_entry(pmd);
277 * Read System Configuration "Register"
278 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
279 * User's Guide", section 4.4.1)
281 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
282 * to set up the serial port for decompression status messages. We
283 * repeat it here because the kernel may not be loaded as a zImage, and
284 * also because it's a hassle to communicate the SCR value to the kernel
285 * from the decompressor.
287 * Note that IRQs are guaranteed to be disabled.
289 static void __init get_assabet_scr(void)
291 unsigned long scr, i;
293 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
294 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
295 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
296 for(i = 100; i--; ) /* Read GPIO 9:2 */
298 GPDR |= 0x3fc; /* restore correct pin direction */
299 scr &= 0x3fc; /* save as system configuration byte. */
304 fixup_assabet(struct machine_desc *desc, struct tag *tags,
305 char **cmdline, struct meminfo *mi)
307 /* This must be done before any call to machine_has_neponset() */
308 map_sa1100_gpio_regs();
311 if (machine_has_neponset())
312 printk("Neponset expansion board detected\n");
316 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
318 if (port->mapbase == _Ser1UTCR0) {
320 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
321 ASSABET_BCR_COM_RTS |
322 ASSABET_BCR_COM_DTR);
324 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
325 ASSABET_BCR_COM_RTS |
326 ASSABET_BCR_COM_DTR);
331 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
332 * and UART3 (radio module). We only handle them for UART1 here.
334 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
336 if (port->mapbase == _Ser1UTCR0) {
337 u_int set = 0, clear = 0;
339 if (mctrl & TIOCM_RTS)
340 clear |= ASSABET_BCR_COM_RTS;
342 set |= ASSABET_BCR_COM_RTS;
344 if (mctrl & TIOCM_DTR)
345 clear |= ASSABET_BCR_COM_DTR;
347 set |= ASSABET_BCR_COM_DTR;
349 ASSABET_BCR_clear(clear);
350 ASSABET_BCR_set(set);
354 static u_int assabet_get_mctrl(struct uart_port *port)
357 u_int bsr = ASSABET_BSR;
359 /* need 2 reads to read current value */
362 if (port->mapbase == _Ser1UTCR0) {
363 if (bsr & ASSABET_BSR_COM_DCD)
365 if (bsr & ASSABET_BSR_COM_CTS)
367 if (bsr & ASSABET_BSR_COM_DSR)
369 } else if (port->mapbase == _Ser3UTCR0) {
370 if (bsr & ASSABET_BSR_RAD_DCD)
372 if (bsr & ASSABET_BSR_RAD_CTS)
374 if (bsr & ASSABET_BSR_RAD_DSR)
376 if (bsr & ASSABET_BSR_RAD_RI)
379 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
385 static struct sa1100_port_fns assabet_port_fns __initdata = {
386 .set_mctrl = assabet_set_mctrl,
387 .get_mctrl = assabet_get_mctrl,
388 .pm = assabet_uart_pm,
391 static struct map_desc assabet_io_desc[] __initdata = {
392 { /* Board Control Register */
393 .virtual = 0xf1000000,
394 .pfn = __phys_to_pfn(0x12000000),
395 .length = 0x00100000,
398 .virtual = 0xf2800000,
399 .pfn = __phys_to_pfn(0x4b800000),
400 .length = 0x00800000,
405 static void __init assabet_map_io(void)
408 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
411 * Set SUS bit in SDCR0 so serial port 1 functions.
412 * Its called GPCLKR0 in my SA1110 manual.
414 Ser1SDCR0 |= SDCR0_SUS;
416 if (machine_has_neponset()) {
417 #ifdef CONFIG_ASSABET_NEPONSET
418 extern void neponset_map_io(void);
421 * We map Neponset registers even if it isn't present since
422 * many drivers will try to probe their stuff (and fail).
423 * This is still more friendly than a kernel paging request
429 sa1100_register_uart_fns(&assabet_port_fns);
433 * When Neponset is attached, the first UART should be
434 * UART3. That's what Angel is doing and many documents
437 * We do the Neponset mapping even if Neponset support
438 * isn't compiled in so the user will still get something on
439 * the expected physical serial port.
441 * We no longer do this; not all boot loaders support it,
442 * and UART3 appears to be somewhat unreliable with blob.
444 sa1100_register_uart(0, 1);
445 sa1100_register_uart(2, 3);
449 MACHINE_START(ASSABET, "Intel-Assabet")
450 .phys_io = 0x80000000,
451 .io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
452 .boot_params = 0xc0000100,
453 .fixup = fixup_assabet,
454 .map_io = assabet_map_io,
455 .init_irq = sa1100_init_irq,
456 .timer = &sa1100_timer,
457 .init_machine = assabet_init,