bcm47xx: add support for bcma bus

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>

6 files changed, 130 insertions, 2 deletions

diff --git a/arch/mips/bcm47xx/Kconfig b/arch/mips/bcm47xx/Kconfig
index 0346f92d12a2..6210b8d84109 100644
--- a/arch/mips/bcm47xx/Kconfig
+++ b/arch/mips/bcm47xx/Kconfig
@@ -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
diff --git a/arch/mips/bcm47xx/gpio.c b/arch/mips/bcm47xx/gpio.c
index 2b804c36750b..57b425fd4d41 100644
--- a/arch/mips/bcm47xx/gpio.c
+++ b/arch/mips/bcm47xx/gpio.c
@@ -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;
 }
@@ -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);
@@ -73,6 +91,10 @@ int gpio_to_irq(unsigned gpio)
                 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;
 }
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c
index 4e994edb1425..a84e3bb7387f 100644
--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
@@ -29,6 +29,9 @@ 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;
         u32 base = 0;
@@ -44,6 +47,13 @@ static void early_nvram_init(void)
                 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
         }
 
         off = FLASH_MIN;
diff --git a/arch/mips/bcm47xx/serial.c b/arch/mips/bcm47xx/serial.c
index fcef68836979..57981e4fe2bc 100644
--- a/arch/mips/bcm47xx/serial.c
+++ b/arch/mips/bcm47xx/serial.c
@@ -47,6 +47,31 @@ 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) {
@@ -54,6 +79,10 @@ static int __init uart8250_init(void)
         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;
 }
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index 142cf1bc8884..17c3d14d7c49 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -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>
@@ -52,6 +53,11 @@ static void bcm47xx_machine_restart(char *command)
                 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)
                 cpu_relax();
@@ -67,6 +73,11 @@ static void bcm47xx_machine_halt(void)
                 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)
                 cpu_relax();
@@ -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);
diff --git a/arch/mips/bcm47xx/time.c b/arch/mips/bcm47xx/time.c
index 03dfc65b1b60..536374dcba78 100644
--- a/arch/mips/bcm47xx/time.c
+++ b/arch/mips/bcm47xx/time.c
@@ -45,6 +45,11 @@ void __init plat_time_init(void)
                 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
         }
 
         if (!hz)