include/linux/ssb/ssb_driver_extif.h

   1 /*
   2  * Hardware-specific External Interface I/O core definitions
   3  * for the BCM47xx family of SiliconBackplane-based chips.
   4  *
   5  * The External Interface core supports a total of three external chip selects
   6  * supporting external interfaces. One of the external chip selects is
   7  * used for Flash, one is used for PCMCIA, and the other may be
   8  * programmed to support either a synchronous interface or an
   9  * asynchronous interface. The asynchronous interface can be used to
  10  * support external devices such as UARTs and the BCM2019 Bluetooth
  11  * baseband processor.
  12  * The external interface core also contains 2 on-chip 16550 UARTs, clock
  13  * frequency control, a watchdog interrupt timer, and a GPIO interface.
  14  *
  15  * Copyright 2005, Broadcom Corporation
  16  * Copyright 2006, Michael Buesch
  17  *
  18  * Licensed under the GPL version 2. See COPYING for details.
  19  */
  20 #ifndef LINUX_SSB_EXTIFCORE_H_
  21 #define LINUX_SSB_EXTIFCORE_H_
  22
  23 /* external interface address space */
  24 #define SSB_EXTIF_PCMCIA_MEMBASE(x)     (x)
  25 #define SSB_EXTIF_PCMCIA_IOBASE(x)      ((x) + 0x100000)
  26 #define SSB_EXTIF_PCMCIA_CFGBASE(x)     ((x) + 0x200000)
  27 #define SSB_EXTIF_CFGIF_BASE(x)         ((x) + 0x800000)
  28 #define SSB_EXTIF_FLASH_BASE(x)         ((x) + 0xc00000)
  29
  30 #define SSB_EXTIF_NR_GPIOOUT            5
  31 /* GPIO NOTE:
  32  * The multiple instances of output and output enable registers
  33  * are present to allow driver software for multiple cores to control
  34  * gpio outputs without needing to share a single register pair.
  35  * Use the following helper macro to get a register offset value.
  36  */
  37 #define SSB_EXTIF_GPIO_OUT(index)       ({              \
  38         BUILD_BUG_ON(index >= SSB_EXTIF_NR_GPIOOUT);    \
  39         SSB_EXTIF_GPIO_OUT_BASE + ((index) * 8);        \
  40                                         })
  41 #define SSB_EXTIF_GPIO_OUTEN(index)     ({              \
  42         BUILD_BUG_ON(index >= SSB_EXTIF_NR_GPIOOUT);    \
  43         SSB_EXTIF_GPIO_OUTEN_BASE + ((index) * 8);      \
  44                                         })
  45
  46 /** EXTIF core registers **/
  47
  48 #define SSB_EXTIF_CTL                   0x0000
  49 #define  SSB_EXTIF_CTL_UARTEN           (1 << 0) /* UART enable */
  50 #define SSB_EXTIF_EXTSTAT               0x0004
  51 #define  SSB_EXTIF_EXTSTAT_EMODE        (1 << 0) /* Endian mode (ro) */
  52 #define  SSB_EXTIF_EXTSTAT_EIRQPIN      (1 << 1) /* External interrupt pin (ro) */
  53 #define  SSB_EXTIF_EXTSTAT_GPIOIRQPIN   (1 << 2) /* GPIO interrupt pin (ro) */
  54 #define SSB_EXTIF_PCMCIA_CFG            0x0010
  55 #define SSB_EXTIF_PCMCIA_MEMWAIT        0x0014
  56 #define SSB_EXTIF_PCMCIA_ATTRWAIT       0x0018
  57 #define SSB_EXTIF_PCMCIA_IOWAIT         0x001C
  58 #define SSB_EXTIF_PROG_CFG              0x0020
  59 #define SSB_EXTIF_PROG_WAITCNT          0x0024
  60 #define SSB_EXTIF_FLASH_CFG             0x0028
  61 #define SSB_EXTIF_FLASH_WAITCNT         0x002C
  62 #define SSB_EXTIF_WATCHDOG              0x0040
  63 #define SSB_EXTIF_CLOCK_N               0x0044
  64 #define SSB_EXTIF_CLOCK_SB              0x0048
  65 #define SSB_EXTIF_CLOCK_PCI             0x004C
  66 #define SSB_EXTIF_CLOCK_MII             0x0050
  67 #define SSB_EXTIF_GPIO_IN               0x0060
  68 #define SSB_EXTIF_GPIO_OUT_BASE         0x0064
  69 #define SSB_EXTIF_GPIO_OUTEN_BASE       0x0068
  70 #define SSB_EXTIF_EJTAG_OUTEN           0x0090
  71 #define SSB_EXTIF_GPIO_INTPOL           0x0094
  72 #define SSB_EXTIF_GPIO_INTMASK          0x0098
  73 #define SSB_EXTIF_UART_DATA             0x0300
  74 #define SSB_EXTIF_UART_TIMER            0x0310
  75 #define SSB_EXTIF_UART_FCR              0x0320
  76 #define SSB_EXTIF_UART_LCR              0x0330
  77 #define SSB_EXTIF_UART_MCR              0x0340
  78 #define SSB_EXTIF_UART_LSR              0x0350
  79 #define SSB_EXTIF_UART_MSR              0x0360
  80 #define SSB_EXTIF_UART_SCRATCH          0x0370
  81
  82
  83
  84
  85 /* pcmcia/prog/flash_config */
  86 #define SSB_EXTCFG_EN                   (1 << 0)        /* enable */
  87 #define SSB_EXTCFG_MODE                 0xE             /* mode */
  88 #define SSB_EXTCFG_MODE_SHIFT           1
  89 #define  SSB_EXTCFG_MODE_FLASH          0x0             /* flash/asynchronous mode */
  90 #define  SSB_EXTCFG_MODE_SYNC           0x2             /* synchronous mode */
  91 #define  SSB_EXTCFG_MODE_PCMCIA         0x4             /* pcmcia mode */
  92 #define SSB_EXTCFG_DS16                 (1 << 4)        /* destsize:  0=8bit, 1=16bit */
  93 #define SSB_EXTCFG_BSWAP                (1 << 5)        /* byteswap */
  94 #define SSB_EXTCFG_CLKDIV               0xC0            /* clock divider */
  95 #define SSB_EXTCFG_CLKDIV_SHIFT         6
  96 #define  SSB_EXTCFG_CLKDIV_2            0x0             /* backplane/2 */
  97 #define  SSB_EXTCFG_CLKDIV_3            0x40            /* backplane/3 */
  98 #define  SSB_EXTCFG_CLKDIV_4            0x80            /* backplane/4 */
  99 #define SSB_EXTCFG_CLKEN                (1 << 8)        /* clock enable */
 100 #define SSB_EXTCFG_STROBE               (1 << 9)        /* size/bytestrobe (synch only) */
 101
 102 /* pcmcia_memwait */
 103 #define SSB_PCMCIA_MEMW_0               0x0000003F      /* waitcount0 */
 104 #define SSB_PCMCIA_MEMW_1               0x00001F00      /* waitcount1 */
 105 #define SSB_PCMCIA_MEMW_1_SHIFT         8
 106 #define SSB_PCMCIA_MEMW_2               0x001F0000      /* waitcount2 */
 107 #define SSB_PCMCIA_MEMW_2_SHIFT         16
 108 #define SSB_PCMCIA_MEMW_3               0x1F000000      /* waitcount3 */
 109 #define SSB_PCMCIA_MEMW_3_SHIFT         24
 110
 111 /* pcmcia_attrwait */
 112 #define SSB_PCMCIA_ATTW_0               0x0000003F      /* waitcount0 */
 113 #define SSB_PCMCIA_ATTW_1               0x00001F00      /* waitcount1 */
 114 #define SSB_PCMCIA_ATTW_1_SHIFT         8
 115 #define SSB_PCMCIA_ATTW_2               0x001F0000      /* waitcount2 */
 116 #define SSB_PCMCIA_ATTW_2_SHIFT         16
 117 #define SSB_PCMCIA_ATTW_3               0x1F000000      /* waitcount3 */
 118 #define SSB_PCMCIA_ATTW_3_SHIFT         24
 119
 120 /* pcmcia_iowait */
 121 #define SSB_PCMCIA_IOW_0                0x0000003F      /* waitcount0 */
 122 #define SSB_PCMCIA_IOW_1                0x00001F00      /* waitcount1 */
 123 #define SSB_PCMCIA_IOW_1_SHIFT          8
 124 #define SSB_PCMCIA_IOW_2                0x001F0000      /* waitcount2 */
 125 #define SSB_PCMCIA_IOW_2_SHIFT          16
 126 #define SSB_PCMCIA_IOW_3                0x1F000000      /* waitcount3 */
 127 #define SSB_PCMCIA_IOW_3_SHIFT          24
 128
 129 /* prog_waitcount */
 130 #define SSB_PROG_WCNT_0                 0x0000001F      /* waitcount0 */
 131 #define SSB_PROG_WCNT_1                 0x00001F00      /* waitcount1 */
 132 #define SSB_PROG_WCNT_1_SHIFT           8
 133 #define SSB_PROG_WCNT_2                 0x001F0000      /* waitcount2 */
 134 #define SSB_PROG_WCNT_2_SHIFT           16
 135 #define SSB_PROG_WCNT_3                 0x1F000000      /* waitcount3 */
 136 #define SSB_PROG_WCNT_3_SHIFT           24
 137
 138 #define SSB_PROG_W0                     0x0000000C
 139 #define SSB_PROG_W1                     0x00000A00
 140 #define SSB_PROG_W2                     0x00020000
 141 #define SSB_PROG_W3                     0x01000000
 142
 143 /* flash_waitcount */
 144 #define SSB_FLASH_WCNT_0                0x0000001F      /* waitcount0 */
 145 #define SSB_FLASH_WCNT_1                0x00001F00      /* waitcount1 */
 146 #define SSB_FLASH_WCNT_1_SHIFT          8
 147 #define SSB_FLASH_WCNT_2                0x001F0000      /* waitcount2 */
 148 #define SSB_FLASH_WCNT_2_SHIFT          16
 149 #define SSB_FLASH_WCNT_3                0x1F000000      /* waitcount3 */
 150 #define SSB_FLASH_WCNT_3_SHIFT          24
 151
 152 /* watchdog */
 153 #define SSB_EXTIF_WATCHDOG_CLK          48000000        /* Hz */
 154
 155 #define SSB_EXTIF_WATCHDOG_MAX_TIMER    ((1 << 28) - 1)
 156 #define SSB_EXTIF_WATCHDOG_MAX_TIMER_MS (SSB_EXTIF_WATCHDOG_MAX_TIMER \
 157                                          / (SSB_EXTIF_WATCHDOG_CLK / 1000))
 158
 159
 160 #ifdef CONFIG_SSB_DRIVER_EXTIF
 161
 162 struct ssb_extif {
 163         struct ssb_device *dev;
 164         spinlock_t gpio_lock;
 165 };
 166
 167 static inline bool ssb_extif_available(struct ssb_extif *extif)
 168 {
 169         return (extif->dev != NULL);
 170 }
 171
 172 extern void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
 173                                        u32 *plltype, u32 *n, u32 *m);
 174
 175 extern void ssb_extif_timing_init(struct ssb_extif *extif,
 176                                   unsigned long ns);
 177
 178 extern u32 ssb_extif_watchdog_timer_set(struct ssb_extif *extif, u32 ticks);
 179
 180 /* Extif GPIO pin access */
 181 u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask);
 182 u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask, u32 value);
 183 u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask, u32 value);
 184 u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask, u32 value);
 185 u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask, u32 value);
 186
 187 #ifdef CONFIG_SSB_SERIAL
 188 extern int ssb_extif_serial_init(struct ssb_extif *extif,
 189                                  struct ssb_serial_port *ports);
 190 #endif /* CONFIG_SSB_SERIAL */
 191
 192
 193 #else /* CONFIG_SSB_DRIVER_EXTIF */
 194 /* extif disabled */
 195
 196 struct ssb_extif {
 197 };
 198
 199 static inline bool ssb_extif_available(struct ssb_extif *extif)
 200 {
 201         return 0;
 202 }
 203
 204 static inline
 205 void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
 206                                 u32 *plltype, u32 *n, u32 *m)
 207 {
 208 }
 209
 210 static inline
 211 void ssb_extif_timing_init(struct ssb_extif *extif, unsigned long ns)
 212 {
 213 }
 214
 215 static inline
 216 u32 ssb_extif_watchdog_timer_set(struct ssb_extif *extif, u32 ticks)
 217 {
 218         return 0;
 219 }
 220
 221 static inline u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask)
 222 {
 223         return 0;
 224 }
 225
 226 static inline u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask,
 227                                      u32 value)
 228 {
 229         return 0;
 230 }
 231
 232 static inline u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask,
 233                                        u32 value)
 234 {
 235         return 0;
 236 }
 237
 238 static inline u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask,
 239                                           u32 value)
 240 {
 241         return 0;
 242 }
 243
 244 static inline u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask,
 245                                          u32 value)
 246 {
 247         return 0;
 248 }
 249
 250 #ifdef CONFIG_SSB_SERIAL
 251 static inline int ssb_extif_serial_init(struct ssb_extif *extif,
 252                                         struct ssb_serial_port *ports)
 253 {
 254         return 0;
 255 }
 256 #endif /* CONFIG_SSB_SERIAL */
 257
 258 #endif /* CONFIG_SSB_DRIVER_EXTIF */
 259 #endif /* LINUX_SSB_EXTIFCORE_H_ */