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
156
157 #ifdef CONFIG_SSB_DRIVER_EXTIF
158
159 struct ssb_extif {
160 struct ssb_device *dev;
161 };
162
163 static inline bool ssb_extif_available(struct ssb_extif *extif)
164 {
165 return (extif->dev != NULL);
166 }
167
168 extern void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
169 u32 *plltype, u32 *n, u32 *m);
170
171 extern void ssb_extif_timing_init(struct ssb_extif *extif,
172 unsigned long ns);
173
174 extern void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
175 u32 ticks);
176
177 /* Extif GPIO pin access */
178 u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask);
179 u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask, u32 value);
180 u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask, u32 value);
181 u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask, u32 value);
182 u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask, u32 value);
183
184 #ifdef CONFIG_SSB_SERIAL
185 extern int ssb_extif_serial_init(struct ssb_extif *extif,
186 struct ssb_serial_port *ports);
187 #endif /* CONFIG_SSB_SERIAL */
188
189
190 #else /* CONFIG_SSB_DRIVER_EXTIF */
191 /* extif disabled */
192
193 struct ssb_extif {
194 };
195
196 static inline bool ssb_extif_available(struct ssb_extif *extif)
197 {
198 return 0;
199 }
200
201 static inline
202 void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
203 u32 *plltype, u32 *n, u32 *m)
204 {
205 }
206
207 static inline
208 void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
209 u32 ticks)
210 {
211 }
212
213 #endif /* CONFIG_SSB_DRIVER_EXTIF */
214 #endif /* LINUX_SSB_EXTIFCORE_H_ */
215
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