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-hwdef.h>
30 #include <asm/pgtable.h>
31 #include <asm/tlbflush.h>
33 #include <asm/mach/arch.h>
34 #include <asm/mach/flash.h>
35 #include <asm/mach/irda.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/serial_sa1100.h>
38 #include <asm/arch/assabet.h>
39 #include <asm/arch/mcp.h>
43 #define ASSABET_BCR_DB1110 \
44 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
45 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
46 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
49 #define ASSABET_BCR_DB1111 \
50 (ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
51 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
52 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
53 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
54 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
56 unsigned long SCR_value = ASSABET_SCR_INIT;
57 EXPORT_SYMBOL(SCR_value);
59 static unsigned long BCR_value = ASSABET_BCR_DB1110;
61 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
65 local_irq_save(flags);
66 BCR_value = (BCR_value & ~mask) | val;
67 ASSABET_BCR = BCR_value;
68 local_irq_restore(flags);
71 EXPORT_SYMBOL(ASSABET_BCR_frob);
73 static void assabet_backlight_power(int on)
75 #ifndef ASSABET_PAL_VIDEO
77 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
80 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
84 * Turn on/off the backlight. When turning the backlight on,
85 * we wait 500us after turning it on so we don't cause the
86 * supplies to droop when we enable the LCD controller (and
87 * cause a hard reset.)
89 static void assabet_lcd_power(int on)
91 #ifndef ASSABET_PAL_VIDEO
93 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
97 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
102 * Assabet flash support code.
107 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
109 static struct mtd_partition assabet_partitions[] = {
111 .name = "bootloader",
114 .mask_flags = MTD_WRITEABLE,
116 .name = "bootloader params",
118 .offset = MTDPART_OFS_APPEND,
119 .mask_flags = MTD_WRITEABLE,
122 .size = MTDPART_SIZ_FULL,
123 .offset = MTDPART_OFS_APPEND,
128 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
130 static struct mtd_partition assabet_partitions[] = {
132 .name = "bootloader",
135 .mask_flags = MTD_WRITEABLE,
137 .name = "bootloader params",
139 .offset = MTDPART_OFS_APPEND,
140 .mask_flags = MTD_WRITEABLE,
143 .size = MTDPART_SIZ_FULL,
144 .offset = MTDPART_OFS_APPEND,
149 static struct flash_platform_data assabet_flash_data = {
150 .map_name = "cfi_probe",
151 .parts = assabet_partitions,
152 .nr_parts = ARRAY_SIZE(assabet_partitions),
155 static struct resource assabet_flash_resources[] = {
157 .start = SA1100_CS0_PHYS,
158 .end = SA1100_CS0_PHYS + SZ_32M - 1,
159 .flags = IORESOURCE_MEM,
161 .start = SA1100_CS1_PHYS,
162 .end = SA1100_CS1_PHYS + SZ_32M - 1,
163 .flags = IORESOURCE_MEM,
169 * Assabet IrDA support code.
172 static int assabet_irda_set_power(struct device *dev, unsigned int state)
174 static unsigned int bcr_state[4] = {
175 ASSABET_BCR_IRDA_MD0,
176 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
177 ASSABET_BCR_IRDA_MD1,
182 state = bcr_state[state];
183 ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
184 ASSABET_BCR_IRDA_MD0));
185 ASSABET_BCR_set(state);
190 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
193 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
195 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
198 static struct irda_platform_data assabet_irda_data = {
199 .set_power = assabet_irda_set_power,
200 .set_speed = assabet_irda_set_speed,
203 static struct mcp_plat_data assabet_mcp_data = {
205 .sclk_rate = 11981000,
208 static void __init assabet_init(void)
211 * Ensure that the power supply is in "high power" mode.
217 * Ensure that these pins are set as outputs and are driving
218 * logic 0. This ensures that we won't inadvertently toggle
219 * the WS latch in the CPLD, and we don't float causing
220 * excessive power drain. --rmk
222 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
223 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
226 * Set up registers for sleep mode.
232 PPDR |= PPC_TXD3 | PPC_TXD1;
233 PPSR |= PPC_TXD3 | PPC_TXD1;
235 sa1100fb_lcd_power = assabet_lcd_power;
236 sa1100fb_backlight_power = assabet_backlight_power;
238 if (machine_has_neponset()) {
240 * Angel sets this, but other bootloaders may not.
242 * This must precede any driver calls to BCR_set()
245 ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
247 #ifndef CONFIG_ASSABET_NEPONSET
248 printk( "Warning: Neponset detected but full support "
249 "hasn't been configured in the kernel\n" );
253 sa11x0_set_flash_data(&assabet_flash_data, assabet_flash_resources,
254 ARRAY_SIZE(assabet_flash_resources));
255 sa11x0_set_irda_data(&assabet_irda_data);
256 sa11x0_set_mcp_data(&assabet_mcp_data);
260 * On Assabet, we must probe for the Neponset board _before_
261 * paging_init() has occurred to actually determine the amount
262 * of RAM available. To do so, we map the appropriate IO section
263 * in the page table here in order to access GPIO registers.
265 static void __init map_sa1100_gpio_regs( void )
267 unsigned long phys = __PREG(GPLR) & PMD_MASK;
268 unsigned long virt = io_p2v(phys);
269 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
272 pmd = pmd_offset(pgd_offset_k(virt), virt);
273 *pmd = __pmd(phys | prot);
274 flush_pmd_entry(pmd);
278 * Read System Configuration "Register"
279 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
280 * User's Guide", section 4.4.1)
282 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
283 * to set up the serial port for decompression status messages. We
284 * repeat it here because the kernel may not be loaded as a zImage, and
285 * also because it's a hassle to communicate the SCR value to the kernel
286 * from the decompressor.
288 * Note that IRQs are guaranteed to be disabled.
290 static void __init get_assabet_scr(void)
292 unsigned long scr, i;
294 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
295 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
296 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
297 for(i = 100; i--; ) /* Read GPIO 9:2 */
299 GPDR |= 0x3fc; /* restore correct pin direction */
300 scr &= 0x3fc; /* save as system configuration byte. */
305 fixup_assabet(struct machine_desc *desc, struct tag *tags,
306 char **cmdline, struct meminfo *mi)
308 /* This must be done before any call to machine_has_neponset() */
309 map_sa1100_gpio_regs();
312 if (machine_has_neponset())
313 printk("Neponset expansion board detected\n");
317 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
319 if (port->mapbase == _Ser1UTCR0) {
321 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
322 ASSABET_BCR_COM_RTS |
323 ASSABET_BCR_COM_DTR);
325 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
326 ASSABET_BCR_COM_RTS |
327 ASSABET_BCR_COM_DTR);
332 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
333 * and UART3 (radio module). We only handle them for UART1 here.
335 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
337 if (port->mapbase == _Ser1UTCR0) {
338 u_int set = 0, clear = 0;
340 if (mctrl & TIOCM_RTS)
341 clear |= ASSABET_BCR_COM_RTS;
343 set |= ASSABET_BCR_COM_RTS;
345 if (mctrl & TIOCM_DTR)
346 clear |= ASSABET_BCR_COM_DTR;
348 set |= ASSABET_BCR_COM_DTR;
350 ASSABET_BCR_clear(clear);
351 ASSABET_BCR_set(set);
355 static u_int assabet_get_mctrl(struct uart_port *port)
358 u_int bsr = ASSABET_BSR;
360 /* need 2 reads to read current value */
363 if (port->mapbase == _Ser1UTCR0) {
364 if (bsr & ASSABET_BSR_COM_DCD)
366 if (bsr & ASSABET_BSR_COM_CTS)
368 if (bsr & ASSABET_BSR_COM_DSR)
370 } else if (port->mapbase == _Ser3UTCR0) {
371 if (bsr & ASSABET_BSR_RAD_DCD)
373 if (bsr & ASSABET_BSR_RAD_CTS)
375 if (bsr & ASSABET_BSR_RAD_DSR)
377 if (bsr & ASSABET_BSR_RAD_RI)
380 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
386 static struct sa1100_port_fns assabet_port_fns __initdata = {
387 .set_mctrl = assabet_set_mctrl,
388 .get_mctrl = assabet_get_mctrl,
389 .pm = assabet_uart_pm,
392 static struct map_desc assabet_io_desc[] __initdata = {
393 { /* Board Control Register */
394 .virtual = 0xf1000000,
395 .pfn = __phys_to_pfn(0x12000000),
396 .length = 0x00100000,
399 .virtual = 0xf2800000,
400 .pfn = __phys_to_pfn(0x4b800000),
401 .length = 0x00800000,
406 static void __init assabet_map_io(void)
409 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
412 * Set SUS bit in SDCR0 so serial port 1 functions.
413 * Its called GPCLKR0 in my SA1110 manual.
415 Ser1SDCR0 |= SDCR0_SUS;
417 if (machine_has_neponset()) {
418 #ifdef CONFIG_ASSABET_NEPONSET
419 extern void neponset_map_io(void);
422 * We map Neponset registers even if it isn't present since
423 * many drivers will try to probe their stuff (and fail).
424 * This is still more friendly than a kernel paging request
430 sa1100_register_uart_fns(&assabet_port_fns);
434 * When Neponset is attached, the first UART should be
435 * UART3. That's what Angel is doing and many documents
438 * We do the Neponset mapping even if Neponset support
439 * isn't compiled in so the user will still get something on
440 * the expected physical serial port.
442 * We no longer do this; not all boot loaders support it,
443 * and UART3 appears to be somewhat unreliable with blob.
445 sa1100_register_uart(0, 1);
446 sa1100_register_uart(2, 3);
450 MACHINE_START(ASSABET, "Intel-Assabet")
451 .phys_io = 0x80000000,
452 .io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
453 .boot_params = 0xc0000100,
454 .fixup = fixup_assabet,
455 .map_io = assabet_map_io,
456 .init_irq = sa1100_init_irq,
457 .timer = &sa1100_timer,
458 .init_machine = assabet_init,