mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
[POWERPC] MPC5200: Don't make firmware fixups into common code
The Lite5200 u-boot image doesn't entirely configure the processor correctly and so Linux needs to fixup the cpu setup in setup_arch. Fixing the CPU setup is good, but making it into common code is not a good idea. New board ports should be encouraged not to take the lead of the lite5200 and instead get their firmware to setup the CPU the right way. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tnt.com>
This commit is contained in:
parent
9fe2e7969d
commit
4de3b992a6
3 changed files with 62 additions and 34 deletions
|
@ -30,19 +30,56 @@
|
||||||
*
|
*
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Fix clock configuration.
|
||||||
|
*
|
||||||
|
* Firmware is supposed to be responsible for this. If you are creating a
|
||||||
|
* new board port, do *NOT* duplicate this code. Fix your boot firmware
|
||||||
|
* to set it correctly in the first place
|
||||||
|
*/
|
||||||
static void __init
|
static void __init
|
||||||
lite5200_setup_cpu(void)
|
lite5200_fix_clock_config(void)
|
||||||
|
{
|
||||||
|
struct mpc52xx_cdm __iomem *cdm;
|
||||||
|
|
||||||
|
/* Map zones */
|
||||||
|
cdm = mpc52xx_find_and_map("mpc5200-cdm");
|
||||||
|
if (!cdm) {
|
||||||
|
printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
|
||||||
|
__FUNCTION__);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Use internal 48 Mhz */
|
||||||
|
out_8(&cdm->ext_48mhz_en, 0x00);
|
||||||
|
out_8(&cdm->fd_enable, 0x01);
|
||||||
|
if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
|
||||||
|
out_be16(&cdm->fd_counters, 0x0001);
|
||||||
|
else
|
||||||
|
out_be16(&cdm->fd_counters, 0x5555);
|
||||||
|
|
||||||
|
/* Unmap the regs */
|
||||||
|
iounmap(cdm);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Fix setting of port_config register.
|
||||||
|
*
|
||||||
|
* Firmware is supposed to be responsible for this. If you are creating a
|
||||||
|
* new board port, do *NOT* duplicate this code. Fix your boot firmware
|
||||||
|
* to set it correctly in the first place
|
||||||
|
*/
|
||||||
|
static void __init
|
||||||
|
lite5200_fix_port_config(void)
|
||||||
{
|
{
|
||||||
struct mpc52xx_gpio __iomem *gpio;
|
struct mpc52xx_gpio __iomem *gpio;
|
||||||
u32 port_config;
|
u32 port_config;
|
||||||
|
|
||||||
/* Map zones */
|
|
||||||
gpio = mpc52xx_find_and_map("mpc5200-gpio");
|
gpio = mpc52xx_find_and_map("mpc5200-gpio");
|
||||||
if (!gpio) {
|
if (!gpio) {
|
||||||
printk(KERN_ERR __FILE__ ": "
|
printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
|
||||||
"Error while mapping GPIO register for port config. "
|
__FUNCTION__);
|
||||||
"Expect some abnormal behavior\n");
|
return;
|
||||||
goto error;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Set port config */
|
/* Set port config */
|
||||||
|
@ -61,7 +98,6 @@ lite5200_setup_cpu(void)
|
||||||
out_be32(&gpio->port_config, port_config);
|
out_be32(&gpio->port_config, port_config);
|
||||||
|
|
||||||
/* Unmap zone */
|
/* Unmap zone */
|
||||||
error:
|
|
||||||
iounmap(gpio);
|
iounmap(gpio);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -100,9 +136,12 @@ static void __init lite5200_setup_arch(void)
|
||||||
if (ppc_md.progress)
|
if (ppc_md.progress)
|
||||||
ppc_md.progress("lite5200_setup_arch()", 0);
|
ppc_md.progress("lite5200_setup_arch()", 0);
|
||||||
|
|
||||||
/* CPU & Port mux setup */
|
/* Fix things that firmware should have done. */
|
||||||
mpc52xx_setup_cpu(); /* Generic */
|
lite5200_fix_clock_config();
|
||||||
lite5200_setup_cpu(); /* Platorm specific */
|
lite5200_fix_port_config();
|
||||||
|
|
||||||
|
/* Some mpc5200 & mpc5200b related configuration */
|
||||||
|
mpc5200_setup_xlb_arbiter();
|
||||||
|
|
||||||
#ifdef CONFIG_PM
|
#ifdef CONFIG_PM
|
||||||
mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
|
mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
|
||||||
|
|
|
@ -75,44 +75,33 @@ mpc52xx_find_ipb_freq(struct device_node *node)
|
||||||
EXPORT_SYMBOL(mpc52xx_find_ipb_freq);
|
EXPORT_SYMBOL(mpc52xx_find_ipb_freq);
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Configure the XLB arbiter settings to match what Linux expects.
|
||||||
|
*/
|
||||||
void __init
|
void __init
|
||||||
mpc52xx_setup_cpu(void)
|
mpc5200_setup_xlb_arbiter(void)
|
||||||
{
|
{
|
||||||
struct mpc52xx_cdm __iomem *cdm;
|
|
||||||
struct mpc52xx_xlb __iomem *xlb;
|
struct mpc52xx_xlb __iomem *xlb;
|
||||||
|
|
||||||
/* Map zones */
|
|
||||||
cdm = mpc52xx_find_and_map("mpc5200-cdm");
|
|
||||||
xlb = mpc52xx_find_and_map("mpc5200-xlb");
|
xlb = mpc52xx_find_and_map("mpc5200-xlb");
|
||||||
|
if (!xlb) {
|
||||||
if (!cdm || !xlb) {
|
|
||||||
printk(KERN_ERR __FILE__ ": "
|
printk(KERN_ERR __FILE__ ": "
|
||||||
"Error while mapping CDM/XLB during mpc52xx_setup_cpu. "
|
"Error mapping XLB in mpc52xx_setup_cpu(). "
|
||||||
"Expect some abnormal behavior\n");
|
"Expect some abnormal behavior\n");
|
||||||
goto unmap_regs;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Use internal 48 Mhz */
|
|
||||||
out_8(&cdm->ext_48mhz_en, 0x00);
|
|
||||||
out_8(&cdm->fd_enable, 0x01);
|
|
||||||
if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
|
|
||||||
out_be16(&cdm->fd_counters, 0x0001);
|
|
||||||
else
|
|
||||||
out_be16(&cdm->fd_counters, 0x5555);
|
|
||||||
|
|
||||||
/* Configure the XLB Arbiter priorities */
|
/* Configure the XLB Arbiter priorities */
|
||||||
out_be32(&xlb->master_pri_enable, 0xff);
|
out_be32(&xlb->master_pri_enable, 0xff);
|
||||||
out_be32(&xlb->master_priority, 0x11111111);
|
out_be32(&xlb->master_priority, 0x11111111);
|
||||||
|
|
||||||
/* Disable XLB pipelining */
|
/* Disable XLB pipelining
|
||||||
/* (cfr errate 292. We could do this only just before ATA PIO
|
* (cfr errate 292. We could do this only just before ATA PIO
|
||||||
transaction and re-enable it afterwards ...) */
|
* transaction and re-enable it afterwards ...)
|
||||||
|
*/
|
||||||
out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_PLDIS);
|
out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_PLDIS);
|
||||||
|
|
||||||
/* Unmap zones */
|
iounmap(xlb);
|
||||||
unmap_regs:
|
|
||||||
if (cdm) iounmap(cdm);
|
|
||||||
if (xlb) iounmap(xlb);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
void __init
|
void __init
|
||||||
|
|
|
@ -243,7 +243,7 @@ struct mpc52xx_cdm {
|
||||||
|
|
||||||
extern void __iomem * mpc52xx_find_and_map(const char *);
|
extern void __iomem * mpc52xx_find_and_map(const char *);
|
||||||
extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
|
extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
|
||||||
extern void mpc52xx_setup_cpu(void);
|
extern void mpc5200_setup_xlb_arbiter(void);
|
||||||
extern void mpc52xx_declare_of_platform_devices(void);
|
extern void mpc52xx_declare_of_platform_devices(void);
|
||||||
|
|
||||||
extern void mpc52xx_init_irq(void);
|
extern void mpc52xx_init_irq(void);
|
||||||
|
|
Loading…
Add table
Reference in a new issue