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bcm47xx: add support for bcma bus
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This patch add support for the bcma bus. Broadcom uses only Mips 74K
CPUs on the new SoC and on the old ons using ssb bus there are no Mips
74K CPUs.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Hauke Mehrtens authored and John W. Linville committed Aug 8, 2011
1 parent a656ffc commit c1d1c5d
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Showing 9 changed files with 190 additions and 2 deletions.
13 changes: 13 additions & 0 deletions arch/mips/bcm47xx/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -15,4 +15,17 @@ config BCM47XX_SSB

This will generate an image with support for SSB and MIPS32 R1 instruction set.

config BCM47XX_BCMA
bool "BCMA Support for Broadcom BCM47XX"
select SYS_HAS_CPU_MIPS32_R2
select BCMA
select BCMA_HOST_SOC
select BCMA_DRIVER_MIPS
select BCMA_DRIVER_PCI_HOSTMODE if PCI
default y
help
Add support for new Broadcom BCM47xx boards with Broadcom specific Advanced Microcontroller Bus.

This will generate an image with support for BCMA and MIPS32 R2 instruction set.

endif
22 changes: 22 additions & 0 deletions arch/mips/bcm47xx/gpio.c
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,16 @@ int gpio_request(unsigned gpio, const char *tag)

return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
return -EINVAL;

if (test_and_set_bit(gpio, gpio_in_use))
return -EBUSY;

return 0;
#endif
}
return -EINVAL;
}
Expand All @@ -57,6 +67,14 @@ void gpio_free(unsigned gpio)
clear_bit(gpio, gpio_in_use);
return;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
return;

clear_bit(gpio, gpio_in_use);
return;
#endif
}
}
EXPORT_SYMBOL(gpio_free);
Expand All @@ -72,6 +90,10 @@ int gpio_to_irq(unsigned gpio)
return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
else
return -EINVAL;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
return bcma_core_mips_irq(bcm47xx_bus.bcma.bus.drv_cc.core) + 2;
#endif
}
return -EINVAL;
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10 changes: 10 additions & 0 deletions arch/mips/bcm47xx/nvram.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@ static void early_nvram_init(void)
{
#ifdef CONFIG_BCM47XX_SSB
struct ssb_mipscore *mcore_ssb;
#endif
#ifdef CONFIG_BCM47XX_BCMA
struct bcma_drv_cc *bcma_cc;
#endif
struct nvram_header *header;
int i;
Expand All @@ -43,6 +46,13 @@ static void early_nvram_init(void)
base = mcore_ssb->flash_window;
lim = mcore_ssb->flash_window_size;
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
base = bcma_cc->pflash.window;
lim = bcma_cc->pflash.window_size;
break;
#endif
}

Expand Down
29 changes: 29 additions & 0 deletions arch/mips/bcm47xx/serial.c
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Original file line number Diff line number Diff line change
Expand Up @@ -47,12 +47,41 @@ static int __init uart8250_init_ssb(void)
}
#endif

#ifdef CONFIG_BCM47XX_BCMA
static int __init uart8250_init_bcma(void)
{
int i;
struct bcma_drv_cc *cc = &(bcm47xx_bus.bcma.bus.drv_cc);

memset(&uart8250_data, 0, sizeof(uart8250_data));

for (i = 0; i < cc->nr_serial_ports; i++) {
struct plat_serial8250_port *p = &(uart8250_data[i]);
struct bcma_serial_port *bcma_port;
bcma_port = &(cc->serial_ports[i]);

p->mapbase = (unsigned int) bcma_port->regs;
p->membase = (void *) bcma_port->regs;
p->irq = bcma_port->irq + 2;
p->uartclk = bcma_port->baud_base;
p->regshift = bcma_port->reg_shift;
p->iotype = UPIO_MEM;
p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
}
return platform_device_register(&uart8250_device);
}
#endif

static int __init uart8250_init(void)
{
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
return uart8250_init_ssb();
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
return uart8250_init_bcma();
#endif
}
return -EINVAL;
Expand Down
53 changes: 51 additions & 2 deletions arch/mips/bcm47xx/setup.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
#include <linux/types.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/time.h>
Expand All @@ -51,6 +52,11 @@ static void bcm47xx_machine_restart(char *command)
case BCM47XX_BUS_TYPE_SSB:
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
break;
#endif
}
while (1)
Expand All @@ -66,6 +72,11 @@ static void bcm47xx_machine_halt(void)
case BCM47XX_BUS_TYPE_SSB:
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
break;
#endif
}
while (1)
Expand Down Expand Up @@ -295,16 +306,54 @@ static void __init bcm47xx_register_ssb(void)
}
#endif

#ifdef CONFIG_BCM47XX_BCMA
static void __init bcm47xx_register_bcma(void)
{
int err;

err = bcma_host_soc_register(&bcm47xx_bus.bcma);
if (err)
panic("Failed to initialize BCMA bus (err %d)\n", err);
}
#endif

void __init plat_mem_setup(void)
{
struct cpuinfo_mips *c = &current_cpu_data;

if (c->cputype == CPU_74K) {
printk(KERN_INFO "bcm47xx: using bcma bus\n");
#ifdef CONFIG_BCM47XX_BCMA
bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
bcm47xx_register_bcma();
#endif
} else {
printk(KERN_INFO "bcm47xx: using ssb bus\n");
#ifdef CONFIG_BCM47XX_SSB
bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
bcm47xx_register_ssb();
bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
bcm47xx_register_ssb();
#endif
}

_machine_restart = bcm47xx_machine_restart;
_machine_halt = bcm47xx_machine_halt;
pm_power_off = bcm47xx_machine_halt;
}

static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
/* Nothing to do */
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_bus_register(&bcm47xx_bus.bcma.bus);
break;
#endif
}
return 0;
}
device_initcall(bcm47xx_register_bus_complete);
5 changes: 5 additions & 0 deletions arch/mips/bcm47xx/time.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,11 @@ void __init plat_time_init(void)
case BCM47XX_BUS_TYPE_SSB:
hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2;
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
hz = bcma_cpu_clock(&bcm47xx_bus.bcma.bus.drv_mips) / 2;
break;
#endif
}

Expand Down
8 changes: 8 additions & 0 deletions arch/mips/include/asm/mach-bcm47xx/bcm47xx.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,17 +20,25 @@
#define __ASM_BCM47XX_H

#include <linux/ssb/ssb.h>
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_soc.h>

enum bcm47xx_bus_type {
#ifdef CONFIG_BCM47XX_SSB
BCM47XX_BUS_TYPE_SSB,
#endif
#ifdef CONFIG_BCM47XX_BCMA
BCM47XX_BUS_TYPE_BCMA,
#endif
};

union bcm47xx_bus {
#ifdef CONFIG_BCM47XX_SSB
struct ssb_bus ssb;
#endif
#ifdef CONFIG_BCM47XX_BCMA
struct bcma_soc bcma;
#endif
};

extern union bcm47xx_bus bcm47xx_bus;
Expand Down
41 changes: 41 additions & 0 deletions arch/mips/include/asm/mach-bcm47xx/gpio.h
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
#define __BCM47XX_GPIO_H

#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma.h>
#include <asm/mach-bcm47xx/bcm47xx.h>

#define BCM47XX_EXTIF_GPIO_LINES 5
Expand All @@ -25,6 +26,11 @@ static inline int gpio_get_value(unsigned gpio)
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
return ssb_gpio_in(&bcm47xx_bus.ssb, 1 << gpio);
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
return bcma_chipco_gpio_in(&bcm47xx_bus.bcma.bus.drv_cc,
1 << gpio);
#endif
}
return -EINVAL;
Expand All @@ -37,6 +43,13 @@ static inline void gpio_set_value(unsigned gpio, int value)
case BCM47XX_BUS_TYPE_SSB:
ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
value ? 1 << gpio : 0);
return;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_gpio_out(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
value ? 1 << gpio : 0);
return;
#endif
}
}
Expand All @@ -48,6 +61,12 @@ static inline int gpio_direction_input(unsigned gpio)
case BCM47XX_BUS_TYPE_SSB:
ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 0);
return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_gpio_outen(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
0);
return 0;
#endif
}
return -EINVAL;
Expand All @@ -64,6 +83,16 @@ static inline int gpio_direction_output(unsigned gpio, int value)
/* then set the gpio mode */
ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 1 << gpio);
return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
/* first set the gpio out value */
bcma_chipco_gpio_out(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
value ? 1 << gpio : 0);
/* then set the gpio mode */
bcma_chipco_gpio_outen(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
1 << gpio);
return 0;
#endif
}
return -EINVAL;
Expand All @@ -77,6 +106,12 @@ static inline int gpio_intmask(unsigned gpio, int value)
ssb_gpio_intmask(&bcm47xx_bus.ssb, 1 << gpio,
value ? 1 << gpio : 0);
return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_gpio_intmask(&bcm47xx_bus.bcma.bus.drv_cc,
1 << gpio, value ? 1 << gpio : 0);
return 0;
#endif
}
return -EINVAL;
Expand All @@ -90,6 +125,12 @@ static inline int gpio_polarity(unsigned gpio, int value)
ssb_gpio_polarity(&bcm47xx_bus.ssb, 1 << gpio,
value ? 1 << gpio : 0);
return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_gpio_polarity(&bcm47xx_bus.bcma.bus.drv_cc,
1 << gpio, value ? 1 << gpio : 0);
return 0;
#endif
}
return -EINVAL;
Expand Down
11 changes: 11 additions & 0 deletions drivers/watchdog/bcm47xx_wdt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,12 @@ static inline void bcm47xx_wdt_hw_start(void)
case BCM47XX_BUS_TYPE_SSB:
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0xfffffff);
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc,
0xfffffff);
break;
#endif
}
}
Expand All @@ -69,6 +75,11 @@ static inline int bcm47xx_wdt_hw_stop(void)
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
return ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
return 0;
#endif
}
return -EINVAL;
Expand Down

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