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>
41 #define ASSABET_BCR_DB1110 \
42 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
43 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
44 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
47 #define ASSABET_BCR_DB1111 \
48 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
49 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
50 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
51 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
52 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
54 unsigned long SCR_value = ASSABET_SCR_INIT;
55 EXPORT_SYMBOL(SCR_value);
57 static unsigned long BCR_value = ASSABET_BCR_DB1110;
59 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
63 local_irq_save(flags);
64 BCR_value = (BCR_value & ~mask) | val;
65 ASSABET_BCR = BCR_value;
66 local_irq_restore(flags);
69 EXPORT_SYMBOL(ASSABET_BCR_frob);
71 static void assabet_backlight_power(int on)
73 #ifndef ASSABET_PAL_VIDEO
75 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
78 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
82 * Turn on/off the backlight. When turning the backlight on,
83 * we wait 500us after turning it on so we don't cause the
84 * supplies to droop when we enable the LCD controller (and
85 * cause a hard reset.)
87 static void assabet_lcd_power(int on)
89 #ifndef ASSABET_PAL_VIDEO
91 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
95 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
100 * Assabet flash support code.
105 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
107 static struct mtd_partition assabet_partitions[] = {
109 .name = "bootloader",
112 .mask_flags = MTD_WRITEABLE,
114 .name = "bootloader params",
116 .offset = MTDPART_OFS_APPEND,
117 .mask_flags = MTD_WRITEABLE,
120 .size = MTDPART_SIZ_FULL,
121 .offset = MTDPART_OFS_APPEND,
126 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
128 static struct mtd_partition assabet_partitions[] = {
130 .name = "bootloader",
133 .mask_flags = MTD_WRITEABLE,
135 .name = "bootloader params",
137 .offset = MTDPART_OFS_APPEND,
138 .mask_flags = MTD_WRITEABLE,
141 .size = MTDPART_SIZ_FULL,
142 .offset = MTDPART_OFS_APPEND,
147 static struct flash_platform_data assabet_flash_data = {
148 .map_name = "cfi_probe",
149 .parts = assabet_partitions,
150 .nr_parts = ARRAY_SIZE(assabet_partitions),
153 static struct resource assabet_flash_resources[] = {
155 .start = SA1100_CS0_PHYS,
156 .end = SA1100_CS0_PHYS + SZ_32M - 1,
157 .flags = IORESOURCE_MEM,
159 .start = SA1100_CS1_PHYS,
160 .end = SA1100_CS1_PHYS + SZ_32M - 1,
161 .flags = IORESOURCE_MEM,
167 * Assabet IrDA support code.
170 static int assabet_irda_set_power(struct device *dev, unsigned int state)
172 static unsigned int bcr_state[4] = {
173 ASSABET_BCR_IRDA_MD0,
174 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
175 ASSABET_BCR_IRDA_MD1,
180 state = bcr_state[state];
181 ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
182 ASSABET_BCR_IRDA_MD0));
183 ASSABET_BCR_set(state);
188 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
191 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
193 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
196 static struct irda_platform_data assabet_irda_data = {
197 .set_power = assabet_irda_set_power,
198 .set_speed = assabet_irda_set_speed,
201 static void __init assabet_init(void)
204 * Ensure that the power supply is in "high power" mode.
210 * Ensure that these pins are set as outputs and are driving
211 * logic 0. This ensures that we won't inadvertently toggle
212 * the WS latch in the CPLD, and we don't float causing
213 * excessive power drain. --rmk
215 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
216 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
219 * Set up registers for sleep mode.
225 PPDR |= PPC_TXD3 | PPC_TXD1;
226 PPSR |= PPC_TXD3 | PPC_TXD1;
228 sa1100fb_lcd_power = assabet_lcd_power;
229 sa1100fb_backlight_power = assabet_backlight_power;
231 if (machine_has_neponset()) {
233 * Angel sets this, but other bootloaders may not.
235 * This must precede any driver calls to BCR_set()
238 ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
240 #ifndef CONFIG_ASSABET_NEPONSET
241 printk( "Warning: Neponset detected but full support "
242 "hasn't been configured in the kernel\n" );
246 sa11x0_set_flash_data(&assabet_flash_data, assabet_flash_resources,
247 ARRAY_SIZE(assabet_flash_resources));
248 sa11x0_set_irda_data(&assabet_irda_data);
252 * On Assabet, we must probe for the Neponset board _before_
253 * paging_init() has occurred to actually determine the amount
254 * of RAM available. To do so, we map the appropriate IO section
255 * in the page table here in order to access GPIO registers.
257 static void __init map_sa1100_gpio_regs( void )
259 unsigned long phys = __PREG(GPLR) & PMD_MASK;
260 unsigned long virt = io_p2v(phys);
261 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
264 pmd = pmd_offset(pgd_offset_k(virt), virt);
265 *pmd = __pmd(phys | prot);
266 flush_pmd_entry(pmd);
270 * Read System Configuration "Register"
271 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
272 * User's Guide", section 4.4.1)
274 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
275 * to set up the serial port for decompression status messages. We
276 * repeat it here because the kernel may not be loaded as a zImage, and
277 * also because it's a hassle to communicate the SCR value to the kernel
278 * from the decompressor.
280 * Note that IRQs are guaranteed to be disabled.
282 static void __init get_assabet_scr(void)
284 unsigned long scr, i;
286 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
287 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
288 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
289 for(i = 100; i--; scr = GPLR); /* Read GPIO 9:2 */
290 GPDR |= 0x3fc; /* restore correct pin direction */
291 scr &= 0x3fc; /* save as system configuration byte. */
296 fixup_assabet(struct machine_desc *desc, struct tag *tags,
297 char **cmdline, struct meminfo *mi)
299 /* This must be done before any call to machine_has_neponset() */
300 map_sa1100_gpio_regs();
303 if (machine_has_neponset())
304 printk("Neponset expansion board detected\n");
308 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
310 if (port->mapbase == _Ser1UTCR0) {
312 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
313 ASSABET_BCR_COM_RTS |
314 ASSABET_BCR_COM_DTR);
316 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
317 ASSABET_BCR_COM_RTS |
318 ASSABET_BCR_COM_DTR);
323 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
324 * and UART3 (radio module). We only handle them for UART1 here.
326 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
328 if (port->mapbase == _Ser1UTCR0) {
329 u_int set = 0, clear = 0;
331 if (mctrl & TIOCM_RTS)
332 clear |= ASSABET_BCR_COM_RTS;
334 set |= ASSABET_BCR_COM_RTS;
336 if (mctrl & TIOCM_DTR)
337 clear |= ASSABET_BCR_COM_DTR;
339 set |= ASSABET_BCR_COM_DTR;
341 ASSABET_BCR_clear(clear);
342 ASSABET_BCR_set(set);
346 static u_int assabet_get_mctrl(struct uart_port *port)
349 u_int bsr = ASSABET_BSR;
351 /* need 2 reads to read current value */
354 if (port->mapbase == _Ser1UTCR0) {
355 if (bsr & ASSABET_BSR_COM_DCD)
357 if (bsr & ASSABET_BSR_COM_CTS)
359 if (bsr & ASSABET_BSR_COM_DSR)
361 } else if (port->mapbase == _Ser3UTCR0) {
362 if (bsr & ASSABET_BSR_RAD_DCD)
364 if (bsr & ASSABET_BSR_RAD_CTS)
366 if (bsr & ASSABET_BSR_RAD_DSR)
368 if (bsr & ASSABET_BSR_RAD_RI)
371 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
377 static struct sa1100_port_fns assabet_port_fns __initdata = {
378 .set_mctrl = assabet_set_mctrl,
379 .get_mctrl = assabet_get_mctrl,
380 .pm = assabet_uart_pm,
383 static struct map_desc assabet_io_desc[] __initdata = {
384 /* virtual physical length type */
385 { 0xf1000000, 0x12000000, 0x00100000, MT_DEVICE }, /* Board Control Register */
386 { 0xf2800000, 0x4b800000, 0x00800000, MT_DEVICE } /* MQ200 */
389 static void __init assabet_map_io(void)
392 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
395 * Set SUS bit in SDCR0 so serial port 1 functions.
396 * Its called GPCLKR0 in my SA1110 manual.
398 Ser1SDCR0 |= SDCR0_SUS;
400 if (machine_has_neponset()) {
401 #ifdef CONFIG_ASSABET_NEPONSET
402 extern void neponset_map_io(void);
405 * We map Neponset registers even if it isn't present since
406 * many drivers will try to probe their stuff (and fail).
407 * This is still more friendly than a kernel paging request
413 sa1100_register_uart_fns(&assabet_port_fns);
417 * When Neponset is attached, the first UART should be
418 * UART3. That's what Angel is doing and many documents
421 * We do the Neponset mapping even if Neponset support
422 * isn't compiled in so the user will still get something on
423 * the expected physical serial port.
425 * We no longer do this; not all boot loaders support it,
426 * and UART3 appears to be somewhat unreliable with blob.
428 sa1100_register_uart(0, 1);
429 sa1100_register_uart(2, 3);
433 MACHINE_START(ASSABET, "Intel-Assabet")
434 .phys_ram = 0xc0000000,
435 .phys_io = 0x80000000,
436 .io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
437 .boot_params = 0xc0000100,
438 .fixup = fixup_assabet,
439 .map_io = assabet_map_io,
440 .init_irq = sa1100_init_irq,
441 .timer = &sa1100_timer,
442 .init_machine = assabet_init,