Commit 362f9b6f authored by Jochen Friedrich's avatar Jochen Friedrich Committed by Kumar Gala

[POWERPC] Move CPM command handling into the cpm drivers

This patch moves the CPM command handling into commproc.c
for CPM1 and cpm2_common.c. This is yet another preparation
to get rid of drivers accessing the CPM via the global cpmp.
Signed-off-by: default avatarJochen Friedrich <jochen@scram.de>
Acked-by: default avatarScott Wood <scottwood@freescale.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarVitaly Bordug <vitb@kernel.crashing.org>
parent 721c0c8a
......@@ -240,6 +240,34 @@ void __init cpm_reset(void)
#endif
}
static DEFINE_SPINLOCK(cmd_lock);
#define MAX_CR_CMD_LOOPS 10000
int cpm_command(u32 command, u8 opcode)
{
int i, ret;
unsigned long flags;
if (command & 0xffffff0f)
return -EINVAL;
spin_lock_irqsave(&cmd_lock, flags);
ret = 0;
out_be16(&cpmp->cp_cpcr, command | CPM_CR_FLG | (opcode << 8));
for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
if ((in_be16(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
goto out;
printk(KERN_ERR "%s(): Not able to issue CPM command\n", __FUNCTION__);
ret = -EIO;
out:
spin_unlock_irqrestore(&cmd_lock, flags);
return ret;
}
EXPORT_SYMBOL(cpm_command);
/* We used to do this earlier, but have to postpone as long as possible
* to ensure the kernel VM is now running.
*/
......
......@@ -83,6 +83,31 @@ cpm2_reset(void)
cpmp = &cpm2_immr->im_cpm;
}
static DEFINE_SPINLOCK(cmd_lock);
#define MAX_CR_CMD_LOOPS 10000
int cpm_command(u32 command, u8 opcode)
{
int i, ret;
unsigned long flags;
spin_lock_irqsave(&cmd_lock, flags);
ret = 0;
out_be32(&cpmp->cp_cpcr, command | opcode | CPM_CR_FLG);
for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
if ((in_be32(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
goto out;
printk(KERN_ERR "%s(): Not able to issue CPM command\n", __FUNCTION__);
ret = -EIO;
out:
spin_unlock_irqrestore(&cmd_lock, flags);
return ret;
}
EXPORT_SYMBOL(cpm_command);
/* Set a baud rate generator. This needs lots of work. There are
* eight BRGs, which can be connected to the CPM channels or output
* as clocks. The BRGs are in two different block of internal
......
......@@ -81,16 +81,8 @@
static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 op)
{
const struct fs_platform_info *fpi = fep->fpi;
int i;
W32(cpmp, cp_cpcr, fpi->cp_command | op | CPM_CR_FLG);
for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
if ((R32(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
return 0;
printk(KERN_ERR "%s(): Not able to issue CPM command\n",
__FUNCTION__);
return 1;
return cpm_command(fpi->cp_command, op);
}
static int do_pd_setup(struct fs_enet_private *fep)
......
......@@ -89,21 +89,12 @@
* Delay to wait for SCC reset command to complete (in us)
*/
#define SCC_RESET_DELAY 50
#define MAX_CR_CMD_LOOPS 10000
static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
{
const struct fs_platform_info *fpi = fep->fpi;
int i;
W16(cpmp, cp_cpcr, fpi->cp_command | CPM_CR_FLG | (op << 8));
for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
if ((R16(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
return 0;
printk(KERN_ERR "%s(): Not able to issue CPM command\n",
__FUNCTION__);
return 1;
return cpm_command(fpi->cp_command, op);
}
static int do_pd_setup(struct fs_enet_private *fep)
......
......@@ -52,11 +52,7 @@
#ifdef CONFIG_PPC_CPM_NEW_BINDING
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
u16 __iomem *cpcr = &cpmp->cp_cpcr;
out_be16(cpcr, port->command | (cmd << 8) | CPM_CR_FLG);
while (in_be16(cpcr) & CPM_CR_FLG)
;
cpm_command(port->command, cmd);
}
#else
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
......
......@@ -52,13 +52,7 @@
#ifdef CONFIG_PPC_CPM_NEW_BINDING
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
cpm_cpm2_t __iomem *cp = cpm2_map(im_cpm);
out_be32(&cp->cp_cpcr, port->command | cmd | CPM_CR_FLG);
while (in_be32(&cp->cp_cpcr) & CPM_CR_FLG)
;
cpm2_unmap(cp);
cpm_command(port->command, cmd);
}
#else
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
......
......@@ -10,5 +10,6 @@ int cpm_muram_free(unsigned long offset);
unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size);
void __iomem *cpm_muram_addr(unsigned long offset);
dma_addr_t cpm_muram_dma(void __iomem *addr);
int cpm_command(u32 command, u8 opcode);
#endif
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