drivers/bcma/driver_chipcommon.c

   1 /*
   2  * Broadcom specific AMBA
   3  * ChipCommon core driver
   4  *
   5  * Copyright 2005, Broadcom Corporation
   6  * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
   7  *
   8  * Licensed under the GNU/GPL. See COPYING for details.
   9  */
  10
  11 #include "bcma_private.h"
  12 #include <linux/export.h>
  13 #include <linux/bcma/bcma.h>
  14
  15 static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
  16                                          u32 mask, u32 value)
  17 {
  18         value &= mask;
  19         value |= bcma_cc_read32(cc, offset) & ~mask;
  20         bcma_cc_write32(cc, offset, value);
  21
  22         return value;
  23 }
  24
  25 void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
  26 {
  27         u32 leddc_on = 10;
  28         u32 leddc_off = 90;
  29
  30         if (cc->setup_done)
  31                 return;
  32
  33         if (cc->core->id.rev >= 11)
  34                 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
  35         cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
  36         if (cc->core->id.rev >= 35)
  37                 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
  38
  39         if (cc->core->id.rev >= 20) {
  40                 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, 0);
  41                 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, 0);
  42         }
  43
  44         if (cc->capabilities & BCMA_CC_CAP_PMU)
  45                 bcma_pmu_init(cc);
  46         if (cc->capabilities & BCMA_CC_CAP_PCTL)
  47                 pr_err("Power control not implemented!\n");
  48
  49         if (cc->core->id.rev >= 16) {
  50                 if (cc->core->bus->sprom.leddc_on_time &&
  51                     cc->core->bus->sprom.leddc_off_time) {
  52                         leddc_on = cc->core->bus->sprom.leddc_on_time;
  53                         leddc_off = cc->core->bus->sprom.leddc_off_time;
  54                 }
  55                 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
  56                         ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
  57                          (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
  58         }
  59
  60         cc->setup_done = true;
  61 }
  62
  63 /* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
  64 void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
  65 {
  66         /* instant NMI */
  67         bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
  68 }
  69
  70 void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
  71 {
  72         bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
  73 }
  74
  75 u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
  76 {
  77         return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
  78 }
  79
  80 u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
  81 {
  82         return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
  83 }
  84
  85 u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
  86 {
  87         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
  88 }
  89
  90 u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
  91 {
  92         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
  93 }
  94
  95 u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
  96 {
  97         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
  98 }
  99 EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
 100
 101 u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
 102 {
 103         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
 104 }
 105
 106 u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
 107 {
 108         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
 109 }
 110
 111 #ifdef CONFIG_BCMA_DRIVER_MIPS
 112 void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
 113 {
 114         unsigned int irq;
 115         u32 baud_base;
 116         u32 i;
 117         unsigned int ccrev = cc->core->id.rev;
 118         struct bcma_serial_port *ports = cc->serial_ports;
 119
 120         if (ccrev >= 11 && ccrev != 15) {
 121                 /* Fixed ALP clock */
 122                 baud_base = bcma_pmu_alp_clock(cc);
 123                 if (ccrev >= 21) {
 124                         /* Turn off UART clock before switching clocksource. */
 125                         bcma_cc_write32(cc, BCMA_CC_CORECTL,
 126                                        bcma_cc_read32(cc, BCMA_CC_CORECTL)
 127                                        & ~BCMA_CC_CORECTL_UARTCLKEN);
 128                 }
 129                 /* Set the override bit so we don't divide it */
 130                 bcma_cc_write32(cc, BCMA_CC_CORECTL,
 131                                bcma_cc_read32(cc, BCMA_CC_CORECTL)
 132                                | BCMA_CC_CORECTL_UARTCLK0);
 133                 if (ccrev >= 21) {
 134                         /* Re-enable the UART clock. */
 135                         bcma_cc_write32(cc, BCMA_CC_CORECTL,
 136                                        bcma_cc_read32(cc, BCMA_CC_CORECTL)
 137                                        | BCMA_CC_CORECTL_UARTCLKEN);
 138                 }
 139         } else {
 140                 pr_err("serial not supported on this device ccrev: 0x%x\n",
 141                        ccrev);
 142                 return;
 143         }
 144
 145         irq = bcma_core_mips_irq(cc->core);
 146
 147         /* Determine the registers of the UARTs */
 148         cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
 149         for (i = 0; i < cc->nr_serial_ports; i++) {
 150                 ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
 151                                 (i * 256);
 152                 ports[i].irq = irq;
 153                 ports[i].baud_base = baud_base;
 154                 ports[i].reg_shift = 0;
 155         }
 156 }
 157 #endif /* CONFIG_BCMA_DRIVER_MIPS */