[PATCH 1/4] omap: Separate out omap2 FS USB platform init functions
Tony Lindgren
tony at atomide.com
Tue Jun 29 07:54:11 EDT 2010
We want to split old FS USB platform init code and stop doing pin multiplexing
under plat-omap. First move 24xx specific init code into omap2_usb[012]_init
functions.
Cc: David Brownell <dbrownell at users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony at atomide.com>
---
arch/arm/plat-omap/usb.c | 252 +++++++++++++++++++++++++++++-----------------
1 files changed, 157 insertions(+), 95 deletions(-)
diff --git a/arch/arm/plat-omap/usb.c b/arch/arm/plat-omap/usb.c
index d3bf17c..9c4929a 100644
--- a/arch/arm/plat-omap/usb.c
+++ b/arch/arm/plat-omap/usb.c
@@ -115,15 +115,56 @@ static void omap2_usb2_enable_5pinunitll(void)
omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
}
+static u32 __init omap2_usb0_init(unsigned nwires, unsigned is_device)
+{
+ u32 syscon1 = 0;
+
+ omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
+
+ if (nwires == 0)
+ return 0;
+
+ if (is_device)
+ omap_cfg_reg(J20_24XX_USB0_PUEN);
+
+ omap_cfg_reg(K18_24XX_USB0_DAT);
+ omap_cfg_reg(K19_24XX_USB0_TXEN);
+ omap_cfg_reg(J14_24XX_USB0_SE0);
+ if (nwires != 3)
+ omap_cfg_reg(J18_24XX_USB0_RCV);
+
+ switch (nwires) {
+ case 3:
+ syscon1 = 2;
+ omap2_usb_devconf_set(0, USB_BIDIR);
+ break;
+ case 4:
+ syscon1 = 1;
+ omap2_usb_devconf_set(0, USB_BIDIR);
+ break;
+ case 6:
+ syscon1 = 3;
+ omap_cfg_reg(J19_24XX_USB0_VP);
+ omap_cfg_reg(K20_24XX_USB0_VM);
+ omap2_usb_devconf_set(0, USB_UNIDIR);
+ break;
+ default:
+ printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
+ 0, nwires);
+ }
+
+ return syscon1 << 16;
+}
+
static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
{
u32 syscon1 = 0;
if (cpu_is_omap24xx())
- omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
+ return omap2_usb0_init(nwires, is_device);
if (nwires == 0) {
- if (cpu_class_is_omap1() && !cpu_is_omap15xx()) {
+ if (!cpu_is_omap15xx()) {
u32 l;
/* pulldown D+/D- */
@@ -135,9 +176,7 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
}
if (is_device) {
- if (cpu_is_omap24xx())
- omap_cfg_reg(J20_24XX_USB0_PUEN);
- else if (cpu_is_omap7xx()) {
+ if (cpu_is_omap7xx()) {
omap_cfg_reg(AA17_7XX_USB_DM);
omap_cfg_reg(W16_7XX_USB_PU_EN);
omap_cfg_reg(W17_7XX_USB_VBUSI);
@@ -147,8 +186,7 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
omap_cfg_reg(W4_USB_PUEN);
}
- /* internal transceiver (unavailable on 17xx, 24xx) */
- if (!cpu_class_is_omap2() && nwires == 2) {
+ if (nwires == 2) {
u32 l;
// omap_cfg_reg(P9_USB_DP);
@@ -183,26 +221,18 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
return 0;
}
- if (cpu_is_omap24xx()) {
- omap_cfg_reg(K18_24XX_USB0_DAT);
- omap_cfg_reg(K19_24XX_USB0_TXEN);
- omap_cfg_reg(J14_24XX_USB0_SE0);
- if (nwires != 3)
- omap_cfg_reg(J18_24XX_USB0_RCV);
- } else {
- omap_cfg_reg(V6_USB0_TXD);
- omap_cfg_reg(W9_USB0_TXEN);
- omap_cfg_reg(W5_USB0_SE0);
- if (nwires != 3)
- omap_cfg_reg(Y5_USB0_RCV);
- }
+ omap_cfg_reg(V6_USB0_TXD);
+ omap_cfg_reg(W9_USB0_TXEN);
+ omap_cfg_reg(W5_USB0_SE0);
+ if (nwires != 3)
+ omap_cfg_reg(Y5_USB0_RCV);
/* NOTE: SPEED and SUSP aren't configured here. OTG hosts
* may be able to use I2C requests to set those bits along
* with VBUS switching and overcurrent detection.
*/
- if (cpu_class_is_omap1() && nwires != 6) {
+ if (nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
@@ -213,21 +243,13 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
switch (nwires) {
case 3:
syscon1 = 2;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(0, USB_BIDIR);
break;
case 4:
syscon1 = 1;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(0, USB_BIDIR);
break;
case 6:
syscon1 = 3;
- if (cpu_is_omap24xx()) {
- omap_cfg_reg(J19_24XX_USB0_VP);
- omap_cfg_reg(K20_24XX_USB0_VM);
- omap2_usb_devconf_set(0, USB_UNIDIR);
- } else {
+ {
u32 l;
omap_cfg_reg(AA9_USB0_VP);
@@ -244,30 +266,66 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
return syscon1 << 16;
}
+static u32 __init omap2_usb1_init(unsigned nwires)
+{
+ u32 syscon1 = 0;
+
+ omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
+
+ if (nwires == 0)
+ return 0;
+
+ /* NOTE: board-specific code must set up pin muxing for usb1,
+ * since each signal could come out on either of two balls.
+ */
+
+ switch (nwires) {
+ case 2:
+ /* NOTE: board-specific code must override this setting if
+ * this TLL link is not using DP/DM
+ */
+ syscon1 = 1;
+ omap2_usb_devconf_set(1, USB_BIDIR_TLL);
+ break;
+ case 3:
+ syscon1 = 2;
+ omap2_usb_devconf_set(1, USB_BIDIR);
+ break;
+ case 4:
+ syscon1 = 1;
+ omap2_usb_devconf_set(1, USB_BIDIR);
+ break;
+ case 6:
+ default:
+ printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
+ 1, nwires);
+ }
+
+ return syscon1 << 20;
+}
+
static u32 __init omap_usb1_init(unsigned nwires)
{
u32 syscon1 = 0;
- if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
+ if (cpu_is_omap24xx())
+ return omap2_usb1_init(nwires);
+
+ if (!cpu_is_omap15xx() && nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~CONF_USB1_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
- if (cpu_is_omap24xx())
- omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
-
if (nwires == 0)
return 0;
/* external transceiver */
- if (cpu_class_is_omap1()) {
- omap_cfg_reg(USB1_TXD);
- omap_cfg_reg(USB1_TXEN);
- if (nwires != 3)
- omap_cfg_reg(USB1_RCV);
- }
+ omap_cfg_reg(USB1_TXD);
+ omap_cfg_reg(USB1_TXEN);
+ if (nwires != 3)
+ omap_cfg_reg(USB1_RCV);
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB1_SEO);
@@ -280,10 +338,6 @@ static u32 __init omap_usb1_init(unsigned nwires)
} else if (cpu_is_omap1710()) {
omap_cfg_reg(R13_1710_USB1_SE0);
// SUSP
- } else if (cpu_is_omap24xx()) {
- /* NOTE: board-specific code must set up pin muxing for usb1,
- * since each signal could come out on either of two balls.
- */
} else {
pr_debug("usb%d cpu unrecognized\n", 1);
return 0;
@@ -291,27 +345,14 @@ static u32 __init omap_usb1_init(unsigned nwires)
switch (nwires) {
case 2:
- if (!cpu_is_omap24xx())
- goto bad;
- /* NOTE: board-specific code must override this setting if
- * this TLL link is not using DP/DM
- */
- syscon1 = 1;
- omap2_usb_devconf_set(1, USB_BIDIR_TLL);
- break;
+ goto bad;
case 3:
syscon1 = 2;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(1, USB_BIDIR);
break;
case 4:
syscon1 = 1;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(1, USB_BIDIR);
break;
case 6:
- if (cpu_is_omap24xx())
- goto bad;
syscon1 = 3;
omap_cfg_reg(USB1_VP);
omap_cfg_reg(USB1_VM);
@@ -331,20 +372,70 @@ bad:
return syscon1 << 20;
}
-static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
+static u32 __init omap2_usb2_init(unsigned nwires, unsigned alt_pingroup)
{
u32 syscon1 = 0;
- if (cpu_is_omap24xx()) {
- omap2_usb2_disable_5pinbitll();
- alt_pingroup = 0;
+ omap2_usb2_disable_5pinbitll();
+ alt_pingroup = 0;
+
+ /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
+ if (alt_pingroup || nwires == 0)
+ return 0;
+
+ omap_cfg_reg(Y11_24XX_USB2_DAT);
+ omap_cfg_reg(AA10_24XX_USB2_SE0);
+ if (nwires > 2)
+ omap_cfg_reg(AA12_24XX_USB2_TXEN);
+ if (nwires > 3)
+ omap_cfg_reg(AA6_24XX_USB2_RCV);
+
+ switch (nwires) {
+ case 2:
+ /* NOTE: board-specific code must override this setting if
+ * this TLL link is not using DP/DM
+ */
+ syscon1 = 1;
+ omap2_usb_devconf_set(2, USB_BIDIR_TLL);
+ break;
+ case 3:
+ syscon1 = 2;
+ omap2_usb_devconf_set(2, USB_BIDIR);
+ break;
+ case 4:
+ syscon1 = 1;
+ omap2_usb_devconf_set(2, USB_BIDIR);
+ break;
+ case 5:
+ omap_cfg_reg(AA4_24XX_USB2_TLLSE0);
+ /* NOTE: board-specific code must override this setting if
+ * this TLL link is not using DP/DM. Something must also
+ * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
+ */
+ syscon1 = 3;
+ omap2_usb2_enable_5pinunitll();
+ break;
+ case 6:
+ default:
+ printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
+ 2, nwires);
}
+ return syscon1 << 24;
+}
+
+static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
+{
+ u32 syscon1 = 0;
+
+ if (cpu_is_omap24xx())
+ return omap2_usb2_init(nwires, alt_pingroup);
+
/* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
if (alt_pingroup || nwires == 0)
return 0;
- if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
+ if (!cpu_is_omap15xx() && nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
@@ -367,53 +458,24 @@ static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
if (nwires != 3)
omap_cfg_reg(Y5_USB2_RCV);
// FIXME omap_cfg_reg(USB2_SPEED);
- } else if (cpu_is_omap24xx()) {
- omap_cfg_reg(Y11_24XX_USB2_DAT);
- omap_cfg_reg(AA10_24XX_USB2_SE0);
- if (nwires > 2)
- omap_cfg_reg(AA12_24XX_USB2_TXEN);
- if (nwires > 3)
- omap_cfg_reg(AA6_24XX_USB2_RCV);
} else {
pr_debug("usb%d cpu unrecognized\n", 1);
return 0;
}
- // if (cpu_class_is_omap1()) omap_cfg_reg(USB2_SUSP);
+ // omap_cfg_reg(USB2_SUSP);
switch (nwires) {
case 2:
- if (!cpu_is_omap24xx())
- goto bad;
- /* NOTE: board-specific code must override this setting if
- * this TLL link is not using DP/DM
- */
- syscon1 = 1;
- omap2_usb_devconf_set(2, USB_BIDIR_TLL);
- break;
+ goto bad;
case 3:
syscon1 = 2;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(2, USB_BIDIR);
break;
case 4:
syscon1 = 1;
- if (cpu_is_omap24xx())
- omap2_usb_devconf_set(2, USB_BIDIR);
break;
case 5:
- if (!cpu_is_omap24xx())
- goto bad;
- omap_cfg_reg(AA4_24XX_USB2_TLLSE0);
- /* NOTE: board-specific code must override this setting if
- * this TLL link is not using DP/DM. Something must also
- * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
- */
- syscon1 = 3;
- omap2_usb2_enable_5pinunitll();
- break;
+ goto bad;
case 6:
- if (cpu_is_omap24xx())
- goto bad;
syscon1 = 3;
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB2_VP);
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