mediatek: Refactor USB code among similar SoCs

Refactor USB code which will be reused among similar SoCs.

BUG=b:80501386
BRANCH=none
TEST=Boots correctly on Elm

Change-Id: I06fefb4149a489be991e13ddf624082d11e31765
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/28786
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 1 insertions, 149 deletions

diff --git a/src/soc/mediatek/mt8173/usb.c b/src/soc/mediatek/mt8173/usb.c
index 1dccfc9a89..a61a64bd8c 100644
--- a/src/soc/mediatek/mt8173/usb.c
+++ b/src/soc/mediatek/mt8173/usb.c
@@ -13,158 +13,10 @@
  * GNU General Public License for more details.
  */
 
-#include <arch/io.h>
-#include <console/console.h>
-#include <delay.h>
-#include <soc/addressmap.h>
 #include <soc/pll.h>
 #include <soc/usb.h>
-#include <timer.h>
 
-#define USBTAG	"[SSUSB] "
-#define u3p_msg(fmt, arg...)   printk(BIOS_INFO, USBTAG fmt, ##arg)
-#define u3p_err(fmt, arg...)   printk(BIOS_ERR, USBTAG fmt, ##arg)
-
-static struct ssusb_ippc_regs *ippc_regs = (void *)(SSUSB_IPPC_BASE);
-static struct ssusb_sif_port *phy_ports = (void *)(SSUSB_SIF_BASE);
-
-static void phy_index_power_on(int index)
-{
-	struct ssusb_sif_port *phy = phy_ports + index;
-
-	if (!index) {
-		/* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
-		setbits_le32(&phy->u3phya.phya_reg0, P3A_RG_U3_VUSB10_ON);
-		/* power domain iso disable */
-		clrbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_ISO_EN);
-	}
-	/* switch to USB function. (system register, force ip into usb mode) */
-	clrbits_le32(&phy->u2phy.u2phydtm0, P2C_FORCE_UART_EN);
-	clrbits_le32(&phy->u2phy.u2phydtm1, P2C_RG_UART_EN);
-	if (!index)
-		clrbits_le32(&phy->u2phy.u2phyacr4, P2C_U2_GPIO_CTR_MSK);
-
-	/* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
-	clrbits_le32(&phy->u2phy.u2phydtm0, P2C_FORCE_SUSPENDM |
-		P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
-
-	/* DP/DM BC1.1 path Disable */
-	clrbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_BC11_SW_EN);
-	/* improve Rx sensitivity */
-	clrsetbits_le32(&phy->u2phy.usbphyacr6,
-		PA6_RG_U2_SQTH, PA6_RG_U2_SQTH_VAL(2));
-	/* OTG Enable */
-	setbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_OTG_VBUSCMP_EN);
-
-	clrsetbits_le32(&phy->u3phya_da.reg0,
-		P3A_RG_XTAL_EXT_EN_U3, P3A_RG_XTAL_EXT_EN_U3_VAL(2));
-
-	clrsetbits_le32(&phy->u3phya.phya_reg9,
-		P3A_RG_RX_DAC_MUX, P3A_RG_RX_DAC_MUX_VAL(4));
-
-	if (!index) {
-		/* [mt8173]disable Change 100uA current from SSUSB */
-		clrbits_le32(&phy->u2phy.usbphyacr5, PA5_RG_U2_HS_100U_U3_EN);
-	}
-
-	clrsetbits_le32(&phy->u3phya.phya_reg6,
-		P3A_RG_TX_EIDLE_CM, P3A_RG_TX_EIDLE_CM_VAL(0xe));
-
-	clrsetbits_le32(&phy->u3phyd.phyd_cdr1,
-		P3D_RG_CDR_BIR_LTD0, P3D_RG_CDR_BIR_LTD0_VAL(0xc));
-	clrsetbits_le32(&phy->u3phyd.phyd_cdr1,
-		P3D_RG_CDR_BIR_LTD1, P3D_RG_CDR_BIR_LTD1_VAL(0x3));
-
-	clrsetbits_le32(&phy->u2phy.u2phydtm1,
-		P2C_RG_SESSEND, P2C_RG_VBUSVALID | P2C_RG_AVALID);
-
-	/* USB 2.0 slew rate calibration */
-	clrsetbits_le32(&phy->u2phy.usbphyacr5,
-		PA5_RG_U2_HSTX_SRCTRL, PA5_RG_U2_HSTX_SRCTRL_VAL(4));
-}
-
-static void u3phy_power_on(void)
+void mtk_usb_prepare(void)
 {
-	phy_index_power_on(0);
-	phy_index_power_on(1);
-}
-
-static int check_ip_clk_status(void)
-{
-	int u3_port_num;
-	u32 check_bits;
-	u32 sts1, sts2;
-	struct stopwatch sw;
-
-	u3_port_num = CAP_U3_PORT_NUM(read32(&ippc_regs->ip_xhci_cap));
-
-	check_bits = STS1_SYSPLL_STABLE | STS1_REF_RST | STS1_SYS125_RST;
-	check_bits |= (u3_port_num ? STS1_U3_MAC_RST : 0);
-
-	stopwatch_init_usecs_expire(&sw, 50000);
-
-	do {
-		if (stopwatch_expired(&sw)) {
-			u3p_err("usb clocks are not stable!!!\n");
-			return -1;
-		}
-
-		sts1 = read32(&ippc_regs->ip_pw_sts1) & check_bits;
-		sts2 = read32(&ippc_regs->ip_pw_sts2) & STS2_U2_MAC_RST;
-	} while ((sts1 != check_bits) || !sts2);
-
-	return 0;
-}
-
-static int u3phy_ports_enable(void)
-{
-	int i;
-	u32 value;
-	int u3_port_num;
-	int u2_port_num;
-
-	value = read32(&ippc_regs->ip_xhci_cap);
-	u3_port_num = CAP_U3_PORT_NUM(value);
-	u2_port_num = CAP_U2_PORT_NUM(value);
-	u3p_msg("%s u2p:%d, u3p:%d\n", __func__, u2_port_num, u3_port_num);
-
-	/* power on host ip */
-	clrbits_le32(&ippc_regs->ip_pw_ctr1, CTRL1_IP_HOST_PDN);
-
-	/* power on and enable all u3 ports */
-	for (i = 0; i < u3_port_num; i++) {
-		clrsetbits_le32(&ippc_regs->u3_ctrl_p[i],
-			CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS, CTRL_U3_PORT_HOST_SEL);
-	}
-
-	/* power on and enable all u2 ports */
-	for (i = 0; i < u2_port_num; i++) {
-		clrsetbits_le32(&ippc_regs->u2_ctrl_p[i],
-			CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS, CTRL_U2_PORT_HOST_SEL);
-	}
-	return check_ip_clk_status();
-}
-
-static inline void ssusb_soft_reset(void)
-{
-	/* reset whole ip */
-	setbits_le32(&ippc_regs->ip_pw_ctr0, CTRL0_IP_SW_RST);
-	clrbits_le32(&ippc_regs->ip_pw_ctr0, CTRL0_IP_SW_RST);
-}
-
-void setup_usb_host(void)
-{
-	int ret;
-
-	u3p_msg("Setting up USB HOST controller...\n");
-
 	mt_pll_enable_ssusb_clk();
-	ssusb_soft_reset();
-	ret = u3phy_ports_enable();
-	if (ret) {
-		u3p_err("%s fail to enable ports\n", __func__);
-		return;
-	}
-	u3phy_power_on();
-	u3p_msg("phy power-on done.\n");
 }