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authorGrant Likely <grant.likely@secretlab.ca>2006-11-28 00:16:27 +0300
committerPaul Mackerras <paulus@samba.org>2006-12-04 12:41:42 +0300
commit6065170cf75c64267f6edec5fd359ce8444bd13d (patch)
treea55c64e512282f545b35876906e8ffb2a597078c /arch/powerpc/platforms/52xx/mpc52xx_pic.c
parente65fdfd6ca447353ad1b4c0a0d20df55f3f6f233 (diff)
downloadlinux-6065170cf75c64267f6edec5fd359ce8444bd13d.tar.xz
[POWERPC] Add common routines for 52xx support in arch/powerpc
Adds utility routines used by 52xx device drivers and board support code. Main functionality is to add device nodes to the of_platform_bus, retrieve the IPB bus frequency, and find+ioremap device registers. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/52xx/mpc52xx_pic.c')
-rw-r--r--arch/powerpc/platforms/52xx/mpc52xx_pic.c110
1 files changed, 22 insertions, 88 deletions
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pic.c b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
index 504154fdf6a6..cd91a6c3aafa 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pic.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -54,12 +54,12 @@ static unsigned char mpc52xx_map_senses[4] = {
*
*/
-static inline void io_be_setbit(u32 __iomem * addr, int bitno)
+static inline void io_be_setbit(u32 __iomem *addr, int bitno)
{
out_be32(addr, in_be32(addr) | (1 << bitno));
}
-static inline void io_be_clrbit(u32 __iomem * addr, int bitno)
+static inline void io_be_clrbit(u32 __iomem *addr, int bitno)
{
out_be32(addr, in_be32(addr) & ~(1 << bitno));
}
@@ -104,7 +104,7 @@ static void mpc52xx_extirq_ack(unsigned int virq)
pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
- io_be_setbit(&intr->ctrl, 27 - l2irq);
+ io_be_setbit(&intr->ctrl, 27-l2irq);
}
static struct irq_chip mpc52xx_extirq_irqchip = {
@@ -379,81 +379,21 @@ static struct irq_host_ops mpc52xx_irqhost_ops = {
void __init mpc52xx_init_irq(void)
{
- struct device_node *picnode = NULL;
- int picnode_regsize;
- u32 picnode_regoffset;
-
- struct device_node *sdmanode = NULL;
- int sdmanode_regsize;
- u32 sdmanode_regoffset;
-
- u64 size64;
- int flags;
-
u32 intr_ctrl;
-
- picnode = of_find_compatible_node(NULL, "interrupt-controller",
- "mpc5200-pic");
- if (picnode == NULL) {
- printk(KERN_ERR "MPC52xx PIC: "
- "Unable to find the interrupt controller "
- "in the OpenFirmware device tree\n");
- goto end;
- }
-
- sdmanode = of_find_compatible_node(NULL, "dma-controller",
- "mpc5200-bestcomm");
- if (sdmanode == NULL) {
- printk(KERN_ERR "MPC52xx PIC"
- "Unable to find the Bestcomm DMA controller device "
- "in the OpenFirmware device tree\n");
- goto end;
- }
-
- /* Retrieve PIC ressources */
- picnode_regoffset = (u32) of_get_address(picnode, 0, &size64, &flags);
- if (picnode_regoffset == 0) {
- printk(KERN_ERR "MPC52xx PIC"
- "Unable to get the interrupt controller address\n");
- goto end;
- }
-
- picnode_regoffset =
- of_translate_address(picnode, (u32 *) picnode_regoffset);
- picnode_regsize = (int)size64;
-
- /* Retrieve SDMA ressources */
- sdmanode_regoffset = (u32) of_get_address(sdmanode, 0, &size64, &flags);
- if (sdmanode_regoffset == 0) {
- printk(KERN_ERR "MPC52xx PIC: "
- "Unable to get the Bestcomm DMA controller address\n");
- goto end;
- }
-
- sdmanode_regoffset =
- of_translate_address(sdmanode, (u32 *) sdmanode_regoffset);
- sdmanode_regsize = (int)size64;
+ struct device_node *picnode;
/* Remap the necessary zones */
- intr = ioremap(picnode_regoffset, picnode_regsize);
- if (intr == NULL) {
- printk(KERN_ERR "MPC52xx PIC: "
- "Unable to ioremap interrupt controller registers!\n");
- goto end;
- }
+ picnode = of_find_compatible_node(NULL, NULL, "mpc52xx-pic");
- sdma = ioremap(sdmanode_regoffset, sdmanode_regsize);
- if (sdma == NULL) {
- iounmap(intr);
- printk(KERN_ERR "MPC52xx PIC: "
- "Unable to ioremap Bestcomm DMA registers!\n");
- goto end;
- }
+ intr = mpc52xx_find_and_map("mpc52xx-pic");
+ if (!intr)
+ panic(__FILE__ ": find_and_map failed on 'mpc52xx-pic'. "
+ "Check node !");
- printk(KERN_INFO "MPC52xx PIC: MPC52xx PIC Remapped at 0x%8.8x\n",
- picnode_regoffset);
- printk(KERN_INFO "MPC52xx PIC: MPC52xx SDMA Remapped at 0x%8.8x\n",
- sdmanode_regoffset);
+ sdma = mpc52xx_find_and_map("mpc52xx-bestcomm");
+ if (!sdma)
+ panic(__FILE__ ": find_and_map failed on 'mpc52xx-bestcomm'. "
+ "Check node !");
/* Disable all interrupt sources. */
out_be32(&sdma->IntPend, 0xffffffff); /* 1 means clear pending */
@@ -480,21 +420,15 @@ void __init mpc52xx_init_irq(void)
* hw irq information provided by the ofw to linux virq
*/
- mpc52xx_irqhost =
- irq_alloc_host(IRQ_HOST_MAP_LINEAR, MPC52xx_IRQ_HIGHTESTHWIRQ,
- &mpc52xx_irqhost_ops, -1);
+ mpc52xx_irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
+ MPC52xx_IRQ_HIGHTESTHWIRQ,
+ &mpc52xx_irqhost_ops, -1);
- if (mpc52xx_irqhost) {
- mpc52xx_irqhost->host_data = picnode;
- printk(KERN_INFO "MPC52xx PIC is up and running!\n");
- } else {
- printk(KERN_ERR
- "MPC52xx PIC: Unable to allocate the IRQ host\n");
- }
+ if (!mpc52xx_irqhost)
+ panic(__FILE__ ": Cannot allocate the IRQ host\n");
-end:
- of_node_put(picnode);
- of_node_put(sdmanode);
+ mpc52xx_irqhost->host_data = picnode;
+ printk(KERN_INFO "MPC52xx PIC is up and running!\n");
}
/*
@@ -526,9 +460,10 @@ unsigned int mpc52xx_get_irq(void)
irq = ffs(status) - 1;
irq |= (MPC52xx_IRQ_L1_SDMA << MPC52xx_IRQ_L1_OFFSET) &
MPC52xx_IRQ_L1_MASK;
- } else
+ } else {
irq |= (MPC52xx_IRQ_L1_PERP << MPC52xx_IRQ_L1_OFFSET) &
MPC52xx_IRQ_L1_MASK;
+ }
}
pr_debug("%s: irq=%x. virq=%d\n", __func__, irq,
@@ -536,4 +471,3 @@ unsigned int mpc52xx_get_irq(void)
return irq_linear_revmap(mpc52xx_irqhost, irq);
}
-