package/boot/uboot-lantiq/patches/0010-net-switchlib-add-driver-for-Lantiq-PSB697X-switch-f.patch

   1 From e2c59cedebf72e4a002134a2932f722b508a5448 Mon Sep 17 00:00:00 2001
   2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   3 Date: Wed, 29 Aug 2012 22:08:15 +0200
   4 Subject: net: switchlib: add driver for Lantiq PSB697X switch family
   5
   6 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   7
   8 --- a/drivers/net/switch/Makefile
   9 +++ b/drivers/net/switch/Makefile
  10 @@ -10,6 +10,7 @@ include $(TOPDIR)/config.mk
  11  LIB    := $(obj)libswitch.o
  12
  13  COBJS-$(CONFIG_SWITCH_MULTI) += switch.o
  14 +COBJS-$(CONFIG_SWITCH_PSB697X) += psb697x.o
  15
  16  COBJS  := $(COBJS-y)
  17  SRCS   := $(COBJS:.o=.c)
  18 --- /dev/null
  19 +++ b/drivers/net/switch/psb697x.c
  20 @@ -0,0 +1,118 @@
  21 +/*
  22 + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
  23 + *
  24 + * SPDX-License-Identifier:    GPL-2.0+
  25 + */
  26 +
  27 +#include <common.h>
  28 +#include <malloc.h>
  29 +#include <switch.h>
  30 +#include <miiphy.h>
  31 +
  32 +#define PSB697X_CHIPID1                0x2599
  33 +#define PSB697X_PORT_COUNT     7
  34 +
  35 +#define PSB697X_PORT_BASE(p)   (p * 0x20)
  36 +#define PSB697X_REG_PS(p)      (PSB697X_PORT_BASE(p) + 0x00)
  37 +#define PSB697X_REG_PBC(p)     (PSB697X_PORT_BASE(p) + 0x01)
  38 +#define PSB697X_REG_PEC(p)     (PSB697X_PORT_BASE(p) + 0x02)
  39 +
  40 +#define PSB697X_REG_SGC1       0x0E0   /* Switch Global Control Register 1 */
  41 +#define PSB697X_REG_SGC2       0x0E1   /* Switch Global Control Register 2 */
  42 +#define PSB697X_REG_CMH                0x0E2   /* CPU Port & Mirror Control */
  43 +#define PSB697X_REG_MIICR      0x0F5   /* MII Port Control */
  44 +#define PSB697X_REG_CI0                0x100   /* Chip Identifier 0 */
  45 +#define PSB697X_REG_CI1                0x101   /* Chip Identifier 1 */
  46 +#define PSB697X_REG_MIIAC      0x120   /* MII Indirect Access Control */
  47 +#define PSB697X_REG_MIIWD      0x121   /* MII Indirect Write Data */
  48 +#define PSB697X_REG_MIIRD      0x122   /* MII Indirect Read Data */
  49 +
  50 +#define PSB697X_REG_PORT_FLP   (1 << 2)        /* Force link up */
  51 +#define PSB697X_REG_PORT_FLD   (1 << 1)        /* Force link down */
  52 +
  53 +#define PSB697X_REG_SGC2_SE    (1 << 15)       /* Switch enable */
  54 +
  55 +#define PSB697X_REG_CMH_CPN_MASK       0x7
  56 +#define PSB697X_REG_CMH_CPN_SHIFT      5
  57 +
  58 +
  59 +static inline int psb697x_mii_read(struct mii_dev *bus, u16 reg)
  60 +{
  61 +       int ret;
  62 +
  63 +       ret = bus->read(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE, reg & 0x1f);
  64 +
  65 +       return ret;
  66 +}
  67 +
  68 +static inline int psb697x_mii_write(struct mii_dev *bus, u16 reg, u16 val)
  69 +{
  70 +       int ret;
  71 +
  72 +       ret = bus->write(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE,
  73 +               reg & 0x1f, val);
  74 +
  75 +       return ret;
  76 +}
  77 +
  78 +static int psb697x_probe(struct switch_device *dev)
  79 +{
  80 +       struct mii_dev *bus = dev->bus;
  81 +       int ci1;
  82 +
  83 +       ci1 = psb697x_mii_read(bus, PSB697X_REG_CI1);
  84 +
  85 +       if (ci1 == PSB697X_CHIPID1)
  86 +               return 0;
  87 +
  88 +       return 1;
  89 +}
  90 +
  91 +static void psb697x_setup(struct switch_device *dev)
  92 +{
  93 +       struct mii_dev *bus = dev->bus;
  94 +       int i, state;
  95 +
  96 +       /* Enable switch */
  97 +       psb697x_mii_write(bus, PSB697X_REG_SGC2, PSB697X_REG_SGC2_SE);
  98 +
  99 +       /*
 100 +        * Force 100 Mbps as default value for CPU ports 5 and 6 to get
 101 +        * full speed.
 102 +        */
 103 +       psb697x_mii_write(bus, PSB697X_REG_MIICR, 0x0773);
 104 +
 105 +       for (i = 0; i < PSB697X_PORT_COUNT; i++) {
 106 +               state = dev->port_mask & (1 << i);
 107 +
 108 +               /*
 109 +                * Software workaround from Errata Sheet:
 110 +                * Force link down and reset internal PHY, keep that state
 111 +                * for all unconnected ports and disable force link down
 112 +                * for all connected ports
 113 +                */
 114 +               psb697x_mii_write(bus, PSB697X_REG_PBC(i),
 115 +                       PSB697X_REG_PORT_FLD);
 116 +
 117 +               if (i == dev->cpu_port)
 118 +                       /* Force link up for CPU port */
 119 +                       psb697x_mii_write(bus, PSB697X_REG_PBC(i),
 120 +                               PSB697X_REG_PORT_FLP);
 121 +               else if (state)
 122 +                       /* Disable force link down for active LAN ports */
 123 +                       psb697x_mii_write(bus, PSB697X_REG_PBC(i), 0);
 124 +       }
 125 +}
 126 +
 127 +static struct switch_driver psb697x_drv = {
 128 +       .name = "psb697x",
 129 +};
 130 +
 131 +void switch_psb697x_init(void)
 132 +{
 133 +       /* For archs with manual relocation */
 134 +       psb697x_drv.probe = psb697x_probe;
 135 +       psb697x_drv.setup = psb697x_setup;
 136 +
 137 +       switch_driver_register(&psb697x_drv);
 138 +}
 139 --- a/drivers/net/switch/switch.c
 140 +++ b/drivers/net/switch/switch.c
 141 @@ -17,6 +17,10 @@ void switch_init(void)
 142         INIT_LIST_HEAD(&switch_drivers);
 143         INIT_LIST_HEAD(&switch_devices);
 144
 145 +#if defined(CONFIG_SWITCH_PSB697X)
 146 +       switch_psb697x_init();
 147 +#endif
 148 +
 149         board_switch_init();
 150  }
 151
 152 --- a/include/switch.h
 153 +++ b/include/switch.h
 154 @@ -97,6 +97,7 @@ static inline void switch_setup(struct s
 155  }
 156
 157  /* Init functions for supported Switch drivers */
 158 +extern void switch_psb697x_init(void);
 159
 160  #endif /* __SWITCH_H */
 161