diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2009-10-07 18:15:15 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 11:52:53 (GMT) |
| commit | 788144656b8a862e724a1296e64ab6375eb541ed (patch) | |
| tree | 96208eed56da25acdf9d923b9d9986e82dcd8944 /arch/mips/alchemy/common/dbdma.c | |
| parent | 93e9cd8485b31e5a33f1040bff4d15e65c0b2d19 (diff) | |
| download | linux-788144656b8a862e724a1296e64ab6375eb541ed.tar.xz | |
MIPS: Alchemy: Stop IRQ name sharing
Eliminate the sharing of IRQ names among the differenct Alchemy
variants. IRQ numbers need no longer be hidden behind a
CONFIG_SOC_AU1XXX symbol: step 1 in my quest to make the Alchemy
code less reliant on a hardcoded subtype.
This patch also renames the GPIO irq number constants. It's really
an interrupt line, NOT a GPIO number!
Code which relied on certain irq numbers to have the same name
across all supported cpu subtypes is changed to determine current
cpu subtype at runtime; in some places this isn't possible so
a "compat" symbol is used.
Run-tested on DB1200.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy/common/dbdma.c')
| -rw-r--r-- | arch/mips/alchemy/common/dbdma.c | 61 |
1 files changed, 36 insertions, 25 deletions
diff --git a/arch/mips/alchemy/common/dbdma.c b/arch/mips/alchemy/common/dbdma.c index f9201ca..549b18f 100644 --- a/arch/mips/alchemy/common/dbdma.c +++ b/arch/mips/alchemy/common/dbdma.c @@ -30,6 +30,7 @@ * */ +#include <linux/init.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/spinlock.h> @@ -58,7 +59,6 @@ static DEFINE_SPINLOCK(au1xxx_dbdma_spin_lock); static dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE; static int dbdma_initialized; -static void au1xxx_dbdma_init(void); static dbdev_tab_t dbdev_tab[] = { #ifdef CONFIG_SOC_AU1550 @@ -250,8 +250,7 @@ u32 au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid, * which can't be done successfully during board set up. */ if (!dbdma_initialized) - au1xxx_dbdma_init(); - dbdma_initialized = 1; + return 0; stp = find_dbdev_id(srcid); if (stp == NULL) @@ -871,28 +870,6 @@ static irqreturn_t dbdma_interrupt(int irq, void *dev_id) return IRQ_RETVAL(1); } -static void au1xxx_dbdma_init(void) -{ - int irq_nr; - - dbdma_gptr->ddma_config = 0; - dbdma_gptr->ddma_throttle = 0; - dbdma_gptr->ddma_inten = 0xffff; - au_sync(); - -#if defined(CONFIG_SOC_AU1550) - irq_nr = AU1550_DDMA_INT; -#elif defined(CONFIG_SOC_AU1200) - irq_nr = AU1200_DDMA_INT; -#else - #error Unknown Au1x00 SOC -#endif - - if (request_irq(irq_nr, dbdma_interrupt, IRQF_DISABLED, - "Au1xxx dbdma", (void *)dbdma_gptr)) - printk(KERN_ERR "Can't get 1550 dbdma irq"); -} - void au1xxx_dbdma_dump(u32 chanid) { chan_tab_t *ctp; @@ -1041,4 +1018,38 @@ void au1xxx_dbdma_resume(void) } } #endif /* CONFIG_PM */ + +static int __init au1xxx_dbdma_init(void) +{ + int irq_nr, ret; + + dbdma_gptr->ddma_config = 0; + dbdma_gptr->ddma_throttle = 0; + dbdma_gptr->ddma_inten = 0xffff; + au_sync(); + + switch (alchemy_get_cputype()) { + case ALCHEMY_CPU_AU1550: + irq_nr = AU1550_DDMA_INT; + break; + case ALCHEMY_CPU_AU1200: + irq_nr = AU1200_DDMA_INT; + break; + default: + return -ENODEV; + } + + ret = request_irq(irq_nr, dbdma_interrupt, IRQF_DISABLED, + "Au1xxx dbdma", (void *)dbdma_gptr); + if (ret) + printk(KERN_ERR "Cannot grab DBDMA interrupt!\n"); + else { + dbdma_initialized = 1; + printk(KERN_INFO "Alchemy DBDMA initialized\n"); + } + + return ret; +} +subsys_initcall(au1xxx_dbdma_init); + #endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */ |