target/linux/brcm47xx/patches-3.0/0006-bcma-add-serial-console-support.patch

   1 From 5088e81ecc5c953df7de84eeedd0817326bc4be4 Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Mon, 6 Jun 2011 00:07:33 +0200
   4 Subject: [PATCH 06/22] bcma: add serial console support
   5
   6 This adds support for serial console to bcma, when operating on an SoC.
   7
   8 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
   9 ---
  10  drivers/bcma/bcma_private.h                 |    8 ++++
  11  drivers/bcma/driver_chipcommon.c            |   48 +++++++++++++++++++++++++++
  12  drivers/bcma/driver_chipcommon_pmu.c        |   26 ++++++++++++++
  13  drivers/bcma/driver_mips.c                  |    1 +
  14  include/linux/bcma/bcma_driver_chipcommon.h |   14 ++++++++
  15  5 files changed, 97 insertions(+), 0 deletions(-)
  16
  17 --- a/drivers/bcma/bcma_private.h
  18 +++ b/drivers/bcma/bcma_private.h
  19 @@ -29,6 +29,14 @@ void bcma_init_bus(struct bcma_bus *bus)
  20  /* sprom.c */
  21  int bcma_sprom_get(struct bcma_bus *bus);
  22
  23 +/* driver_chipcommon.c */
  24 +#ifdef CONFIG_BCMA_DRIVER_MIPS
  25 +void bcma_chipco_serial_init(struct bcma_drv_cc *cc);
  26 +#endif /* CONFIG_BCMA_DRIVER_MIPS */
  27 +
  28 +/* driver_chipcommon_pmu.c */
  29 +u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc);
  30 +
  31  #ifdef CONFIG_BCMA_HOST_PCI
  32  /* host_pci.c */
  33  extern int __init bcma_host_pci_init(void);
  34 --- a/drivers/bcma/driver_chipcommon.c
  35 +++ b/drivers/bcma/driver_chipcommon.c
  36 @@ -106,3 +106,51 @@ u32 bcma_chipco_gpio_polarity(struct bcm
  37  {
  38         return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
  39  }
  40 +
  41 +#ifdef CONFIG_BCMA_DRIVER_MIPS
  42 +void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
  43 +{
  44 +       unsigned int irq;
  45 +       u32 baud_base;
  46 +       u32 i;
  47 +       unsigned int ccrev = cc->core->id.rev;
  48 +       struct bcma_serial_port *ports = cc->serial_ports;
  49 +
  50 +       if (ccrev >= 11 && ccrev != 15) {
  51 +               /* Fixed ALP clock */
  52 +               baud_base = bcma_pmu_alp_clock(cc);
  53 +               if (ccrev >= 21) {
  54 +                       /* Turn off UART clock before switching clocksource. */
  55 +                       bcma_cc_write32(cc, BCMA_CC_CORECTL,
  56 +                                      bcma_cc_read32(cc, BCMA_CC_CORECTL)
  57 +                                      & ~BCMA_CC_CORECTL_UARTCLKEN);
  58 +               }
  59 +               /* Set the override bit so we don't divide it */
  60 +               bcma_cc_write32(cc, BCMA_CC_CORECTL,
  61 +                              bcma_cc_read32(cc, BCMA_CC_CORECTL)
  62 +                              | BCMA_CC_CORECTL_UARTCLK0);
  63 +               if (ccrev >= 21) {
  64 +                       /* Re-enable the UART clock. */
  65 +                       bcma_cc_write32(cc, BCMA_CC_CORECTL,
  66 +                                      bcma_cc_read32(cc, BCMA_CC_CORECTL)
  67 +                                      | BCMA_CC_CORECTL_UARTCLKEN);
  68 +               }
  69 +       } else {
  70 +               pr_err("serial not supported on this device ccrev: 0x%x\n",
  71 +                      ccrev);
  72 +               return;
  73 +       }
  74 +
  75 +       irq = bcma_core_mips_irq(cc->core);
  76 +
  77 +       /* Determine the registers of the UARTs */
  78 +       cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
  79 +       for (i = 0; i < cc->nr_serial_ports; i++) {
  80 +               ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
  81 +                               (i * 256);
  82 +               ports[i].irq = irq;
  83 +               ports[i].baud_base = baud_base;
  84 +               ports[i].reg_shift = 0;
  85 +       }
  86 +}
  87 +#endif /* CONFIG_BCMA_DRIVER_MIPS */
  88 --- a/drivers/bcma/driver_chipcommon_pmu.c
  89 +++ b/drivers/bcma/driver_chipcommon_pmu.c
  90 @@ -136,3 +136,29 @@ void bcma_pmu_init(struct bcma_drv_cc *c
  91         bcma_pmu_swreg_init(cc);
  92         bcma_pmu_workarounds(cc);
  93  }
  94 +
  95 +u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc)
  96 +{
  97 +       struct bcma_bus *bus = cc->core->bus;
  98 +
  99 +       switch (bus->chipinfo.id) {
 100 +       case 0x4716:
 101 +       case 0x4748:
 102 +       case 47162:
 103 +       case 0x4313:
 104 +       case 0x5357:
 105 +       case 0x4749:
 106 +       case 53572:
 107 +               /* always 20Mhz */
 108 +               return 20000 * 1000;
 109 +       case 0x5356:
 110 +       case 0x5300:
 111 +               /* always 25Mhz */
 112 +               return 25000 * 1000;
 113 +       default:
 114 +               pr_warn("No ALP clock specified for %04X device, "
 115 +                       "pmu rev. %d, using default %d Hz\n",
 116 +                       bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
 117 +       }
 118 +       return BCMA_CC_PMU_ALP_CLOCK;
 119 +}
 120 --- a/drivers/bcma/driver_mips.c
 121 +++ b/drivers/bcma/driver_mips.c
 122 @@ -238,6 +238,7 @@ void bcma_core_mips_init(struct bcma_drv
 123         if (mcore->setup_done)
 124                 return;
 125
 126 +       bcma_chipco_serial_init(&bus->drv_cc);
 127         bcma_core_mips_flash_detect(mcore);
 128         mcore->setup_done = true;
 129  }
 130 --- a/include/linux/bcma/bcma_driver_chipcommon.h
 131 +++ b/include/linux/bcma/bcma_driver_chipcommon.h
 132 @@ -241,6 +241,9 @@
 133  #define BCMA_CC_SPROM                  0x0800 /* SPROM beginning */
 134  #define BCMA_CC_SPROM_PCIE6            0x0830 /* SPROM beginning on PCIe rev >= 6 */
 135
 136 +/* ALP clock on pre-PMU chips */
 137 +#define BCMA_CC_PMU_ALP_CLOCK          20000000
 138 +
 139  /* Data for the PMU, if available.
 140   * Check availability with ((struct bcma_chipcommon)->capabilities & BCMA_CC_CAP_PMU)
 141   */
 142 @@ -255,6 +258,14 @@ struct bcma_pflash {
 143         u32 window;
 144         u32 window_size;
 145  };
 146 +
 147 +struct bcma_serial_port {
 148 +       void *regs;
 149 +       unsigned long clockspeed;
 150 +       unsigned int irq;
 151 +       unsigned int baud_base;
 152 +       unsigned int reg_shift;
 153 +};
 154  #endif /* CONFIG_BCMA_DRIVER_MIPS */
 155
 156  struct bcma_drv_cc {
 157 @@ -268,6 +279,9 @@ struct bcma_drv_cc {
 158         struct bcma_chipcommon_pmu pmu;
 159  #ifdef CONFIG_BCMA_DRIVER_MIPS
 160         struct bcma_pflash pflash;
 161 +
 162 +       int nr_serial_ports;
 163 +       struct bcma_serial_port serial_ports[4];
 164  #endif /* CONFIG_BCMA_DRIVER_MIPS */
 165  };
 166