~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/arm/mach-sa1100/assabet.c

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.11 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.84 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.154 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.201 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.201 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.77 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * linux/arch/arm/mach-sa1100/assabet.c
  3  *
  4  * Author: Nicolas Pitre
  5  *
  6  * This file contains all Assabet-specific tweaks.
  7  *
  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.
 11  */
 12 #include <linux/init.h>
 13 #include <linux/kernel.h>
 14 #include <linux/module.h>
 15 #include <linux/errno.h>
 16 #include <linux/ioport.h>
 17 #include <linux/serial_core.h>
 18 #include <linux/mtd/mtd.h>
 19 #include <linux/mtd/partitions.h>
 20 #include <linux/delay.h>
 21 #include <linux/mm.h>
 22 
 23 #include <mach/hardware.h>
 24 #include <asm/mach-types.h>
 25 #include <asm/irq.h>
 26 #include <asm/setup.h>
 27 #include <asm/page.h>
 28 #include <asm/pgtable-hwdef.h>
 29 #include <asm/pgtable.h>
 30 #include <asm/tlbflush.h>
 31 
 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 <mach/assabet.h>
 38 #include <mach/mcp.h>
 39 
 40 #include "generic.h"
 41 
 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 | \
 46          ASSABET_BCR_IRDA_MD0)
 47 
 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)
 54 
 55 unsigned long SCR_value = ASSABET_SCR_INIT;
 56 EXPORT_SYMBOL(SCR_value);
 57 
 58 static unsigned long BCR_value = ASSABET_BCR_DB1110;
 59 
 60 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
 61 {
 62         unsigned long flags;
 63 
 64         local_irq_save(flags);
 65         BCR_value = (BCR_value & ~mask) | val;
 66         ASSABET_BCR = BCR_value;
 67         local_irq_restore(flags);
 68 }
 69 
 70 EXPORT_SYMBOL(ASSABET_BCR_frob);
 71 
 72 static void assabet_backlight_power(int on)
 73 {
 74 #ifndef ASSABET_PAL_VIDEO
 75         if (on)
 76                 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
 77         else
 78 #endif
 79                 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
 80 }
 81 
 82 /*
 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.)
 87  */
 88 static void assabet_lcd_power(int on)
 89 {
 90 #ifndef ASSABET_PAL_VIDEO
 91         if (on) {
 92                 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
 93                 udelay(500);
 94         } else
 95 #endif
 96                 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
 97 }
 98 
 99 
100 /*
101  * Assabet flash support code.
102  */
103 
104 #ifdef ASSABET_REV_4
105 /*
106  * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
107  */
108 static struct mtd_partition assabet_partitions[] = {
109         {
110                 .name           = "bootloader",
111                 .size           = 0x00020000,
112                 .offset         = 0,
113                 .mask_flags     = MTD_WRITEABLE,
114         }, {
115                 .name           = "bootloader params",
116                 .size           = 0x00020000,
117                 .offset         = MTDPART_OFS_APPEND,
118                 .mask_flags     = MTD_WRITEABLE,
119         }, {
120                 .name           = "jffs",
121                 .size           = MTDPART_SIZ_FULL,
122                 .offset         = MTDPART_OFS_APPEND,
123         }
124 };
125 #else
126 /*
127  * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
128  */
129 static struct mtd_partition assabet_partitions[] = {
130         {
131                 .name           = "bootloader",
132                 .size           = 0x00040000,
133                 .offset         = 0,
134                 .mask_flags     = MTD_WRITEABLE,
135         }, {
136                 .name           = "bootloader params",
137                 .size           = 0x00040000,
138                 .offset         = MTDPART_OFS_APPEND,
139                 .mask_flags     = MTD_WRITEABLE,
140         }, {
141                 .name           = "jffs",
142                 .size           = MTDPART_SIZ_FULL,
143                 .offset         = MTDPART_OFS_APPEND,
144         }
145 };
146 #endif
147 
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),
152 };
153 
154 static struct resource assabet_flash_resources[] = {
155         {
156                 .start  = SA1100_CS0_PHYS,
157                 .end    = SA1100_CS0_PHYS + SZ_32M - 1,
158                 .flags  = IORESOURCE_MEM,
159         }, {
160                 .start  = SA1100_CS1_PHYS,
161                 .end    = SA1100_CS1_PHYS + SZ_32M - 1,
162                 .flags  = IORESOURCE_MEM,
163         }
164 };
165 
166 
167 /*
168  * Assabet IrDA support code.
169  */
170 
171 static int assabet_irda_set_power(struct device *dev, unsigned int state)
172 {
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,
177                 0
178         };
179 
180         if (state < 4) {
181                 state = bcr_state[state];
182                 ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
183                                            ASSABET_BCR_IRDA_MD0));
184                 ASSABET_BCR_set(state);
185         }
186         return 0;
187 }
188 
189 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
190 {
191         if (speed < 4000000)
192                 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
193         else
194                 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
195 }
196 
197 static struct irda_platform_data assabet_irda_data = {
198         .set_power      = assabet_irda_set_power,
199         .set_speed      = assabet_irda_set_speed,
200 };
201 
202 static struct mcp_plat_data assabet_mcp_data = {
203         .mccr0          = MCCR0_ADM,
204         .sclk_rate      = 11981000,
205 };
206 
207 static void __init assabet_init(void)
208 {
209         /*
210          * Ensure that the power supply is in "high power" mode.
211          */
212         GPDR |= GPIO_GPIO16;
213         GPSR = GPIO_GPIO16;
214 
215         /*
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
220          */
221         GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
222         GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
223 
224         /*
225          * Set up registers for sleep mode.
226          */
227         PWER = PWER_GPIO0;
228         PGSR = 0;
229         PCFR = 0;
230         PSDR = 0;
231         PPDR |= PPC_TXD3 | PPC_TXD1;
232         PPSR |= PPC_TXD3 | PPC_TXD1;
233 
234         sa1100fb_lcd_power = assabet_lcd_power;
235         sa1100fb_backlight_power = assabet_backlight_power;
236 
237         if (machine_has_neponset()) {
238                 /*
239                  * Angel sets this, but other bootloaders may not.
240                  *
241                  * This must precede any driver calls to BCR_set()
242                  * or BCR_clear().
243                  */
244                 ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
245 
246 #ifndef CONFIG_ASSABET_NEPONSET
247                 printk( "Warning: Neponset detected but full support "
248                         "hasn't been configured in the kernel\n" );
249 #endif
250         }
251 
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);
256 }
257 
258 /*
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.
263  */
264 static void __init map_sa1100_gpio_regs( void )
265 {
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);
269         pmd_t *pmd;
270 
271         pmd = pmd_offset(pgd_offset_k(virt), virt);
272         *pmd = __pmd(phys | prot);
273         flush_pmd_entry(pmd);
274 }
275 
276 /*
277  * Read System Configuration "Register"
278  * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
279  * User's Guide", section 4.4.1)
280  *
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.
286  *
287  * Note that IRQs are guaranteed to be disabled.
288  */
289 static void __init get_assabet_scr(void)
290 {
291         unsigned long scr, i;
292 
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 */
297                 scr = GPLR;
298         GPDR |= 0x3fc;                  /*  restore correct pin direction */
299         scr &= 0x3fc;                   /* save as system configuration byte. */
300         SCR_value = scr;
301 }
302 
303 static void __init
304 fixup_assabet(struct machine_desc *desc, struct tag *tags,
305               char **cmdline, struct meminfo *mi)
306 {
307         /* This must be done before any call to machine_has_neponset() */
308         map_sa1100_gpio_regs();
309         get_assabet_scr();
310 
311         if (machine_has_neponset())
312                 printk("Neponset expansion board detected\n");
313 }
314 
315 
316 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
317 {
318         if (port->mapbase == _Ser1UTCR0) {
319                 if (state)
320                         ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
321                                           ASSABET_BCR_COM_RTS |
322                                           ASSABET_BCR_COM_DTR);
323                 else
324                         ASSABET_BCR_set(ASSABET_BCR_RS232EN |
325                                         ASSABET_BCR_COM_RTS |
326                                         ASSABET_BCR_COM_DTR);
327         }
328 }
329 
330 /*
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.
333  */
334 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
335 {
336         if (port->mapbase == _Ser1UTCR0) {
337                 u_int set = 0, clear = 0;
338 
339                 if (mctrl & TIOCM_RTS)
340                         clear |= ASSABET_BCR_COM_RTS;
341                 else
342                         set |= ASSABET_BCR_COM_RTS;
343 
344                 if (mctrl & TIOCM_DTR)
345                         clear |= ASSABET_BCR_COM_DTR;
346                 else
347                         set |= ASSABET_BCR_COM_DTR;
348 
349                 ASSABET_BCR_clear(clear);
350                 ASSABET_BCR_set(set);
351         }
352 }
353 
354 static u_int assabet_get_mctrl(struct uart_port *port)
355 {
356         u_int ret = 0;
357         u_int bsr = ASSABET_BSR;
358 
359         /* need 2 reads to read current value */
360         bsr = ASSABET_BSR;
361 
362         if (port->mapbase == _Ser1UTCR0) {
363                 if (bsr & ASSABET_BSR_COM_DCD)
364                         ret |= TIOCM_CD;
365                 if (bsr & ASSABET_BSR_COM_CTS)
366                         ret |= TIOCM_CTS;
367                 if (bsr & ASSABET_BSR_COM_DSR)
368                         ret |= TIOCM_DSR;
369         } else if (port->mapbase == _Ser3UTCR0) {
370                 if (bsr & ASSABET_BSR_RAD_DCD)
371                         ret |= TIOCM_CD;
372                 if (bsr & ASSABET_BSR_RAD_CTS)
373                         ret |= TIOCM_CTS;
374                 if (bsr & ASSABET_BSR_RAD_DSR)
375                         ret |= TIOCM_DSR;
376                 if (bsr & ASSABET_BSR_RAD_RI)
377                         ret |= TIOCM_RI;
378         } else {
379                 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
380         }
381 
382         return ret;
383 }
384 
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,
389 };
390 
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,
396                 .type           = MT_DEVICE
397         }, {    /* MQ200 */
398                 .virtual        =  0xf2800000,
399                 .pfn            = __phys_to_pfn(0x4b800000),
400                 .length         = 0x00800000,
401                 .type           = MT_DEVICE
402         }
403 };
404 
405 static void __init assabet_map_io(void)
406 {
407         sa1100_map_io();
408         iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
409 
410         /*
411          * Set SUS bit in SDCR0 so serial port 1 functions.
412          * Its called GPCLKR0 in my SA1110 manual.
413          */
414         Ser1SDCR0 |= SDCR0_SUS;
415 
416         if (machine_has_neponset()) {
417 #ifdef CONFIG_ASSABET_NEPONSET
418                 extern void neponset_map_io(void);
419 
420                 /*
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
424                  * crash.
425                  */
426                 neponset_map_io();
427 #endif
428         } else {
429                 sa1100_register_uart_fns(&assabet_port_fns);
430         }
431 
432         /*
433          * When Neponset is attached, the first UART should be
434          * UART3.  That's what Angel is doing and many documents
435          * are stating this.
436          *
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.
440          *
441          * We no longer do this; not all boot loaders support it,
442          * and UART3 appears to be somewhat unreliable with blob.
443          */
444         sa1100_register_uart(0, 1);
445         sa1100_register_uart(2, 3);
446 }
447 
448 
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,
458 MACHINE_END
459 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp