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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Hardware-specific External Interface I/O core definitions
* for the BCM47xx family of SiliconBackplane-based chips.
*
* The External Interface core supports a total of three external chip selects
* supporting external interfaces. One of the external chip selects is
* used for Flash, one is used for PCMCIA, and the other may be
* programmed to support either a synchronous interface or an
* asynchronous interface. The asynchronous interface can be used to
* support external devices such as UARTs and the BCM2019 Bluetooth
* baseband processor.
* The external interface core also contains 2 on-chip 16550 UARTs, clock
* frequency control, a watchdog interrupt timer, and a GPIO interface.
*
* Copyright 2005, Broadcom Corporation
* Copyright 2006, Michael Buesch
*/
#ifndef LINUX_SSB_EXTIFCORE_H_
#define LINUX_SSB_EXTIFCORE_H_
/* external interface address space */
#define SSB_EXTIF_PCMCIA_MEMBASE(x) (x)
#define SSB_EXTIF_PCMCIA_IOBASE(x) ((x) + 0x100000)
#define SSB_EXTIF_PCMCIA_CFGBASE(x) ((x) + 0x200000)
#define SSB_EXTIF_CFGIF_BASE(x) ((x) + 0x800000)
#define SSB_EXTIF_FLASH_BASE(x) ((x) + 0xc00000)
#define SSB_EXTIF_NR_GPIOOUT 5
/* GPIO NOTE:
* The multiple instances of output and output enable registers
* are present to allow driver software for multiple cores to control
* gpio outputs without needing to share a single register pair.
* Use the following helper macro to get a register offset value.
*/
#define SSB_EXTIF_GPIO_OUT(index) ({ \
BUILD_BUG_ON(index >= SSB_EXTIF_NR_GPIOOUT); \
SSB_EXTIF_GPIO_OUT_BASE + ((index) * 8); \
})
#define SSB_EXTIF_GPIO_OUTEN(index) ({ \
BUILD_BUG_ON(index >= SSB_EXTIF_NR_GPIOOUT); \
SSB_EXTIF_GPIO_OUTEN_BASE + ((index) * 8); \
})
/** EXTIF core registers **/
#define SSB_EXTIF_CTL 0x0000
#define SSB_EXTIF_CTL_UARTEN (1 << 0) /* UART enable */
#define SSB_EXTIF_EXTSTAT 0x0004
#define SSB_EXTIF_EXTSTAT_EMODE (1 << 0) /* Endian mode (ro) */
#define SSB_EXTIF_EXTSTAT_EIRQPIN (1 << 1) /* External interrupt pin (ro) */
#define SSB_EXTIF_EXTSTAT_GPIOIRQPIN (1 << 2) /* GPIO interrupt pin (ro) */
#define SSB_EXTIF_PCMCIA_CFG 0x0010
#define SSB_EXTIF_PCMCIA_MEMWAIT 0x0014
#define SSB_EXTIF_PCMCIA_ATTRWAIT 0x0018
#define SSB_EXTIF_PCMCIA_IOWAIT 0x001C
#define SSB_EXTIF_PROG_CFG 0x0020
#define SSB_EXTIF_PROG_WAITCNT 0x0024
#define SSB_EXTIF_FLASH_CFG 0x0028
#define SSB_EXTIF_FLASH_WAITCNT 0x002C
#define SSB_EXTIF_WATCHDOG 0x0040
#define SSB_EXTIF_CLOCK_N 0x0044
#define SSB_EXTIF_CLOCK_SB 0x0048
#define SSB_EXTIF_CLOCK_PCI 0x004C
#define SSB_EXTIF_CLOCK_MII 0x0050
#define SSB_EXTIF_GPIO_IN 0x0060
#define SSB_EXTIF_GPIO_OUT_BASE 0x0064
#define SSB_EXTIF_GPIO_OUTEN_BASE 0x0068
#define SSB_EXTIF_EJTAG_OUTEN 0x0090
#define SSB_EXTIF_GPIO_INTPOL 0x0094
#define SSB_EXTIF_GPIO_INTMASK 0x0098
#define SSB_EXTIF_UART_DATA 0x0300
#define SSB_EXTIF_UART_TIMER 0x0310
#define SSB_EXTIF_UART_FCR 0x0320
#define SSB_EXTIF_UART_LCR 0x0330
#define SSB_EXTIF_UART_MCR 0x0340
#define SSB_EXTIF_UART_LSR 0x0350
#define SSB_EXTIF_UART_MSR 0x0360
#define SSB_EXTIF_UART_SCRATCH 0x0370
/* pcmcia/prog/flash_config */
#define SSB_EXTCFG_EN (1 << 0) /* enable */
#define SSB_EXTCFG_MODE 0xE /* mode */
#define SSB_EXTCFG_MODE_SHIFT 1
#define SSB_EXTCFG_MODE_FLASH 0x0 /* flash/asynchronous mode */
#define SSB_EXTCFG_MODE_SYNC 0x2 /* synchronous mode */
#define SSB_EXTCFG_MODE_PCMCIA 0x4 /* pcmcia mode */
#define SSB_EXTCFG_DS16 (1 << 4) /* destsize: 0=8bit, 1=16bit */
#define SSB_EXTCFG_BSWAP (1 << 5) /* byteswap */
#define SSB_EXTCFG_CLKDIV 0xC0 /* clock divider */
#define SSB_EXTCFG_CLKDIV_SHIFT 6
#define SSB_EXTCFG_CLKDIV_2 0x0 /* backplane/2 */
#define SSB_EXTCFG_CLKDIV_3 0x40 /* backplane/3 */
#define SSB_EXTCFG_CLKDIV_4 0x80 /* backplane/4 */
#define SSB_EXTCFG_CLKEN (1 << 8) /* clock enable */
#define SSB_EXTCFG_STROBE (1 << 9) /* size/bytestrobe (synch only) */
/* pcmcia_memwait */
#define SSB_PCMCIA_MEMW_0 0x0000003F /* waitcount0 */
#define SSB_PCMCIA_MEMW_1 0x00001F00 /* waitcount1 */
#define SSB_PCMCIA_MEMW_1_SHIFT 8
#define SSB_PCMCIA_MEMW_2 0x001F0000 /* waitcount2 */
#define SSB_PCMCIA_MEMW_2_SHIFT 16
#define SSB_PCMCIA_MEMW_3 0x1F000000 /* waitcount3 */
#define SSB_PCMCIA_MEMW_3_SHIFT 24
/* pcmcia_attrwait */
#define SSB_PCMCIA_ATTW_0 0x0000003F /* waitcount0 */
#define SSB_PCMCIA_ATTW_1 0x00001F00 /* waitcount1 */
#define SSB_PCMCIA_ATTW_1_SHIFT 8
#define SSB_PCMCIA_ATTW_2 0x001F0000 /* waitcount2 */
#define SSB_PCMCIA_ATTW_2_SHIFT 16
#define SSB_PCMCIA_ATTW_3 0x1F000000 /* waitcount3 */
#define SSB_PCMCIA_ATTW_3_SHIFT 24
/* pcmcia_iowait */
#define SSB_PCMCIA_IOW_0 0x0000003F /* waitcount0 */
#define SSB_PCMCIA_IOW_1 0x00001F00 /* waitcount1 */
#define SSB_PCMCIA_IOW_1_SHIFT 8
#define SSB_PCMCIA_IOW_2 0x001F0000 /* waitcount2 */
#define SSB_PCMCIA_IOW_2_SHIFT 16
#define SSB_PCMCIA_IOW_3 0x1F000000 /* waitcount3 */
#define SSB_PCMCIA_IOW_3_SHIFT 24
/* prog_waitcount */
#define SSB_PROG_WCNT_0 0x0000001F /* waitcount0 */
#define SSB_PROG_WCNT_1 0x00001F00 /* waitcount1 */
#define SSB_PROG_WCNT_1_SHIFT 8
#define SSB_PROG_WCNT_2 0x001F0000 /* waitcount2 */
#define SSB_PROG_WCNT_2_SHIFT 16
#define SSB_PROG_WCNT_3 0x1F000000 /* waitcount3 */
#define SSB_PROG_WCNT_3_SHIFT 24
#define SSB_PROG_W0 0x0000000C
#define SSB_PROG_W1 0x00000A00
#define SSB_PROG_W2 0x00020000
#define SSB_PROG_W3 0x01000000
/* flash_waitcount */
#define SSB_FLASH_WCNT_0 0x0000001F /* waitcount0 */
#define SSB_FLASH_WCNT_1 0x00001F00 /* waitcount1 */
#define SSB_FLASH_WCNT_1_SHIFT 8
#define SSB_FLASH_WCNT_2 0x001F0000 /* waitcount2 */
#define SSB_FLASH_WCNT_2_SHIFT 16
#define SSB_FLASH_WCNT_3 0x1F000000 /* waitcount3 */
#define SSB_FLASH_WCNT_3_SHIFT 24
/* watchdog */
#define SSB_EXTIF_WATCHDOG_CLK 48000000 /* Hz */
#define SSB_EXTIF_WATCHDOG_MAX_TIMER ((1 << 28) - 1)
#define SSB_EXTIF_WATCHDOG_MAX_TIMER_MS (SSB_EXTIF_WATCHDOG_MAX_TIMER \
/ (SSB_EXTIF_WATCHDOG_CLK / 1000))
#ifdef CONFIG_SSB_DRIVER_EXTIF
struct ssb_extif {
struct ssb_device *dev;
spinlock_t gpio_lock;
};
static inline bool ssb_extif_available(struct ssb_extif *extif)
{
return (extif->dev != NULL);
}
extern void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
u32 *plltype, u32 *n, u32 *m);
extern void ssb_extif_timing_init(struct ssb_extif *extif,
unsigned long ns);
extern u32 ssb_extif_watchdog_timer_set(struct ssb_extif *extif, u32 ticks);
/* Extif GPIO pin access */
u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask);
u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask, u32 value);
u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask, u32 value);
u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask, u32 value);
u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask, u32 value);
#ifdef CONFIG_SSB_SERIAL
extern int ssb_extif_serial_init(struct ssb_extif *extif,
struct ssb_serial_port *ports);
#endif /* CONFIG_SSB_SERIAL */
#else /* CONFIG_SSB_DRIVER_EXTIF */
/* extif disabled */
struct ssb_extif {
};
static inline bool ssb_extif_available(struct ssb_extif *extif)
{
return 0;
}
static inline
void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
u32 *plltype, u32 *n, u32 *m)
{
}
static inline
void ssb_extif_timing_init(struct ssb_extif *extif, unsigned long ns)
{
}
static inline
u32 ssb_extif_watchdog_timer_set(struct ssb_extif *extif, u32 ticks)
{
return 0;
}
static inline u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask)
{
return 0;
}
static inline u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask,
u32 value)
{
return 0;
}
static inline u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask,
u32 value)
{
return 0;
}
static inline u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask,
u32 value)
{
return 0;
}
static inline u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask,
u32 value)
{
return 0;
}
#ifdef CONFIG_SSB_SERIAL
static inline int ssb_extif_serial_init(struct ssb_extif *extif,
struct ssb_serial_port *ports)
{
return 0;
}
#endif /* CONFIG_SSB_SERIAL */
#endif /* CONFIG_SSB_DRIVER_EXTIF */
#endif /* LINUX_SSB_EXTIFCORE_H_ */
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