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authorMarkus Lidel <Markus.Lidel@shadowconnect.com>2006-02-03 06:04:29 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-03 11:32:07 -0500
commit8b3e09e19932835fb77c63aaf3b1af6117e78871 (patch)
treed98125db1fe2ee0c82426cac98c954cd62842e88 /drivers/message/i2o
parent15d8ec7d08fbb7876e292b42bc92da8d82df7ea9 (diff)
[PATCH] I2O: fix and workaround for Motorola/Freescale controller
- This controller violates the I2O spec for the I/O registers. The patch contains a workaround which moves the registers to the proper location. (originally author: Matthew Starzewski) - If a message frame is beyond the mapped address range a error is returned. Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/message/i2o')
-rw-r--r--drivers/message/i2o/core.h3
-rw-r--r--drivers/message/i2o/pci.c18
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/message/i2o/core.h b/drivers/message/i2o/core.h
index 90628562851e..184974cc734d 100644
--- a/drivers/message/i2o/core.h
+++ b/drivers/message/i2o/core.h
@@ -60,4 +60,7 @@ extern void i2o_iop_remove(struct i2o_controller *);
60#define I2O_IN_PORT 0x40 60#define I2O_IN_PORT 0x40
61#define I2O_OUT_PORT 0x44 61#define I2O_OUT_PORT 0x44
62 62
63/* Motorola/Freescale specific register offset */
64#define I2O_MOTOROLA_PORT_OFFSET 0x10400
65
63#define I2O_IRQ_OUTBOUND_POST 0x00000008 66#define I2O_IRQ_OUTBOUND_POST 0x00000008
diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index e2e3fc79c78a..4f1515cae5dc 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -168,6 +168,24 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
168 c->in_port = c->base.virt + I2O_IN_PORT; 168 c->in_port = c->base.virt + I2O_IN_PORT;
169 c->out_port = c->base.virt + I2O_OUT_PORT; 169 c->out_port = c->base.virt + I2O_OUT_PORT;
170 170
171 /* Motorola/Freescale chip does not follow spec */
172 if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) {
173 /* Check if CPU is enabled */
174 if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) {
175 printk(KERN_INFO "%s: MPC82XX needs CPU running to "
176 "service I2O.\n", c->name);
177 i2o_pci_free(c);
178 return -ENODEV;
179 } else {
180 c->irq_status += I2O_MOTOROLA_PORT_OFFSET;
181 c->irq_mask += I2O_MOTOROLA_PORT_OFFSET;
182 c->in_port += I2O_MOTOROLA_PORT_OFFSET;
183 c->out_port += I2O_MOTOROLA_PORT_OFFSET;
184 printk(KERN_INFO "%s: MPC82XX workarounds activated.\n",
185 c->name);
186 }
187 }
188
171 if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) { 189 if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) {
172 i2o_pci_free(c); 190 i2o_pci_free(c);
173 return -ENOMEM; 191 return -ENOMEM;